Home / 21,355.13-29,470.68-11,924.30

Finding the Fourth Proportional to 21,355.13, 29,470.68 and 11,924.30

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Solution

The fourth proportional to 21,355.13, 29,470.68 and 11,924.30 is: 16,455.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.13 : 29,470.68 = 11,924.30 : x
  2. Step 2: Convert to fraction form
    21,355.13/29,470.68 = 11,924.30/x
  3. Step 3: Cross multiply
    21,355.13x = 29,470.68 × 11,924.30
  4. Step 4: Simplify right side
    21,355.13x = 351,417,082.17
  5. Step 5: Solve for x
    x = 351,417,082.17/21,355.13
  6. Step 6: Final answer
    x = 16,455.87

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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.