Home / 22,760.05-31,411.20-12,690.13

Finding the Fourth Proportional to 22,760.05, 31,411.20 and 12,690.13

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Solution

The fourth proportional to 22,760.05, 31,411.20 and 12,690.13 is: 17,513.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,760.05 : 31,411.20 = 12,690.13 : x
  2. Step 2: Convert to fraction form
    22,760.05/31,411.20 = 12,690.13/x
  3. Step 3: Cross multiply
    22,760.05x = 31,411.20 × 12,690.13
  4. Step 4: Simplify right side
    22,760.05x = 398,612,211.46
  5. Step 5: Solve for x
    x = 398,612,211.46/22,760.05
  6. Step 6: Final answer
    x = 17,513.68

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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.