Home / 16,215.68-22,372.80-9,921.92

Finding the Fourth Proportional to 16,215.68, 22,372.80 and 9,921.92

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Solution

The fourth proportional to 16,215.68, 22,372.80 and 9,921.92 is: 13,689.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,215.68 : 22,372.80 = 9,921.92 : x
  2. Step 2: Convert to fraction form
    16,215.68/22,372.80 = 9,921.92/x
  3. Step 3: Cross multiply
    16,215.68x = 22,372.80 × 9,921.92
  4. Step 4: Simplify right side
    16,215.68x = 221,981,131.78
  5. Step 5: Solve for x
    x = 221,981,131.78/16,215.68
  6. Step 6: Final answer
    x = 13,689.29

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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.