Home / 21,381.92-29,506.13-11,691.20

Finding the Fourth Proportional to 21,381.92, 29,506.13 and 11,691.20

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Solution

The fourth proportional to 21,381.92, 29,506.13 and 11,691.20 is: 16,133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.92 : 29,506.13 = 11,691.20 : x
  2. Step 2: Convert to fraction form
    21,381.92/29,506.13 = 11,691.20/x
  3. Step 3: Cross multiply
    21,381.92x = 29,506.13 × 11,691.20
  4. Step 4: Simplify right side
    21,381.92x = 344,962,126.21
  5. Step 5: Solve for x
    x = 344,962,126.21/21,381.92
  6. Step 6: Final answer
    x = 16,133.35

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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.