Home / 21,970.98-30,322.11-12,540.96

Finding the Fourth Proportional to 21,970.98, 30,322.11 and 12,540.96

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Solution

The fourth proportional to 21,970.98, 30,322.11 and 12,540.96 is: 17,307.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.98 : 30,322.11 = 12,540.96 : x
  2. Step 2: Convert to fraction form
    21,970.98/30,322.11 = 12,540.96/x
  3. Step 3: Cross multiply
    21,970.98x = 30,322.11 × 12,540.96
  4. Step 4: Simplify right side
    21,970.98x = 380,268,368.63
  5. Step 5: Solve for x
    x = 380,268,368.63/21,970.98
  6. Step 6: Final answer
    x = 17,307.76

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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.