Home / 21,883.96-30,198.18-12,930.76

Finding the Fourth Proportional to 21,883.96, 30,198.18 and 12,930.76

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Solution

The fourth proportional to 21,883.96, 30,198.18 and 12,930.76 is: 17,843.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,883.96 : 30,198.18 = 12,930.76 : x
  2. Step 2: Convert to fraction form
    21,883.96/30,198.18 = 12,930.76/x
  3. Step 3: Cross multiply
    21,883.96x = 30,198.18 × 12,930.76
  4. Step 4: Simplify right side
    21,883.96x = 390,485,418.02
  5. Step 5: Solve for x
    x = 390,485,418.02/21,883.96
  6. Step 6: Final answer
    x = 17,843.45

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Find fourth proportional to 10,941.98, 15,099.09 and 6,465.38
Half scale
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Double scale
Find fourth proportional to 21,884.96, 30,199.56 and 12,931.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.