Home / 21,581.13-29,781.49-12,020.98

Finding the Fourth Proportional to 21,581.13, 29,781.49 and 12,020.98

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Solution

The fourth proportional to 21,581.13, 29,781.49 and 12,020.98 is: 16,588.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.13 : 29,781.49 = 12,020.98 : x
  2. Step 2: Convert to fraction form
    21,581.13/29,781.49 = 12,020.98/x
  3. Step 3: Cross multiply
    21,581.13x = 29,781.49 × 12,020.98
  4. Step 4: Simplify right side
    21,581.13x = 358,002,695.66
  5. Step 5: Solve for x
    x = 358,002,695.66/21,581.13
  6. Step 6: Final answer
    x = 16,588.69

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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.