Home / 22,312.87-30,781.15-13,358.66

Finding the Fourth Proportional to 22,312.87, 30,781.15 and 13,358.66

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Solution

The fourth proportional to 22,312.87, 30,781.15 and 13,358.66 is: 18,428.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,312.87 : 30,781.15 = 13,358.66 : x
  2. Step 2: Convert to fraction form
    22,312.87/30,781.15 = 13,358.66/x
  3. Step 3: Cross multiply
    22,312.87x = 30,781.15 × 13,358.66
  4. Step 4: Simplify right side
    22,312.87x = 411,194,729.96
  5. Step 5: Solve for x
    x = 411,194,729.96/22,312.87
  6. Step 6: Final answer
    x = 18,428.59

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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.