Home / 21,656.68-29,877.92-13,155.78

Finding the Fourth Proportional to 21,656.68, 29,877.92 and 13,155.78

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Solution

The fourth proportional to 21,656.68, 29,877.92 and 13,155.78 is: 18,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.68 : 29,877.92 = 13,155.78 : x
  2. Step 2: Convert to fraction form
    21,656.68/29,877.92 = 13,155.78/x
  3. Step 3: Cross multiply
    21,656.68x = 29,877.92 × 13,155.78
  4. Step 4: Simplify right side
    21,656.68x = 393,067,342.38
  5. Step 5: Solve for x
    x = 393,067,342.38/21,656.68
  6. Step 6: Final answer
    x = 18,149.94

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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.