Home / 21,781.76-30,057.92-12,350.12

Finding the Fourth Proportional to 21,781.76, 30,057.92 and 12,350.12

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Solution

The fourth proportional to 21,781.76, 30,057.92 and 12,350.12 is: 17,042.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.76 : 30,057.92 = 12,350.12 : x
  2. Step 2: Convert to fraction form
    21,781.76/30,057.92 = 12,350.12/x
  3. Step 3: Cross multiply
    21,781.76x = 30,057.92 × 12,350.12
  4. Step 4: Simplify right side
    21,781.76x = 371,218,918.95
  5. Step 5: Solve for x
    x = 371,218,918.95/21,781.76
  6. Step 6: Final answer
    x = 17,042.65

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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.