Home / 21,132.78-29,163.15-11,572.71

Finding the Fourth Proportional to 21,132.78, 29,163.15 and 11,572.71

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Solution

The fourth proportional to 21,132.78, 29,163.15 and 11,572.71 is: 15,970.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.78 : 29,163.15 = 11,572.71 : x
  2. Step 2: Convert to fraction form
    21,132.78/29,163.15 = 11,572.71/x
  3. Step 3: Cross multiply
    21,132.78x = 29,163.15 × 11,572.71
  4. Step 4: Simplify right side
    21,132.78x = 337,496,677.64
  5. Step 5: Solve for x
    x = 337,496,677.64/21,132.78
  6. Step 6: Final answer
    x = 15,970.29

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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.