Home / 21,487.54-29,642.51-12,869.56

Finding the Fourth Proportional to 21,487.54, 29,642.51 and 12,869.56

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Solution

The fourth proportional to 21,487.54, 29,642.51 and 12,869.56 is: 17,753.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.54 : 29,642.51 = 12,869.56 : x
  2. Step 2: Convert to fraction form
    21,487.54/29,642.51 = 12,869.56/x
  3. Step 3: Cross multiply
    21,487.54x = 29,642.51 × 12,869.56
  4. Step 4: Simplify right side
    21,487.54x = 381,485,963.48
  5. Step 5: Solve for x
    x = 381,485,963.48/21,487.54
  6. Step 6: Final answer
    x = 17,753.82

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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.