Home / 21,885.85-30,201.23-12,934.19

Finding the Fourth Proportional to 21,885.85, 30,201.23 and 12,934.19

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Solution

The fourth proportional to 21,885.85, 30,201.23 and 12,934.19 is: 17,848.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.85 : 30,201.23 = 12,934.19 : x
  2. Step 2: Convert to fraction form
    21,885.85/30,201.23 = 12,934.19/x
  3. Step 3: Cross multiply
    21,885.85x = 30,201.23 × 12,934.19
  4. Step 4: Simplify right side
    21,885.85x = 390,628,447.05
  5. Step 5: Solve for x
    x = 390,628,447.05/21,885.85
  6. Step 6: Final answer
    x = 17,848.45

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Double scale
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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.