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Finding the Fourth Proportional to 21,691.17, 29,937.02 and 13,734.13

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Solution

The fourth proportional to 21,691.17, 29,937.02 and 13,734.13 is: 18,955.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.17 : 29,937.02 = 13,734.13 : x
  2. Step 2: Convert to fraction form
    21,691.17/29,937.02 = 13,734.13/x
  3. Step 3: Cross multiply
    21,691.17x = 29,937.02 × 13,734.13
  4. Step 4: Simplify right side
    21,691.17x = 411,158,924.49
  5. Step 5: Solve for x
    x = 411,158,924.49/21,691.17
  6. Step 6: Final answer
    x = 18,955.13

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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.