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Finding the Fourth Proportional to 15,689.17, 21,642.01 and 9,397.90

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Solution

The fourth proportional to 15,689.17, 21,642.01 and 9,397.90 is: 12,963.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.17 : 21,642.01 = 9,397.90 : x
  2. Step 2: Convert to fraction form
    15,689.17/21,642.01 = 9,397.90/x
  3. Step 3: Cross multiply
    15,689.17x = 21,642.01 × 9,397.90
  4. Step 4: Simplify right side
    15,689.17x = 203,389,445.78
  5. Step 5: Solve for x
    x = 203,389,445.78/15,689.17
  6. Step 6: Final answer
    x = 12,963.68

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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.