Home / 20,732.19-28,611.20-11,781.21

Finding the Fourth Proportional to 20,732.19, 28,611.20 and 11,781.21

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Solution

The fourth proportional to 20,732.19, 28,611.20 and 11,781.21 is: 16,258.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.19 : 28,611.20 = 11,781.21 : x
  2. Step 2: Convert to fraction form
    20,732.19/28,611.20 = 11,781.21/x
  3. Step 3: Cross multiply
    20,732.19x = 28,611.20 × 11,781.21
  4. Step 4: Simplify right side
    20,732.19x = 337,074,555.55
  5. Step 5: Solve for x
    x = 337,074,555.55/20,732.19
  6. Step 6: Final answer
    x = 16,258.51

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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.