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Finding the Fourth Proportional to 21,502.71, 29,672.73 and 11,943.20

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Solution

The fourth proportional to 21,502.71, 29,672.73 and 11,943.20 is: 16,481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,502.71 : 29,672.73 = 11,943.20 : x
  2. Step 2: Convert to fraction form
    21,502.71/29,672.73 = 11,943.20/x
  3. Step 3: Cross multiply
    21,502.71x = 29,672.73 × 11,943.20
  4. Step 4: Simplify right side
    21,502.71x = 354,387,423.12
  5. Step 5: Solve for x
    x = 354,387,423.12/21,502.71
  6. Step 6: Final answer
    x = 16,481.06

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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.