Home / 20,517.10-30,775.95-13,541.78

Finding the Fourth Proportional to 20,517.10, 30,775.95 and 13,541.78

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Solution

The fourth proportional to 20,517.10, 30,775.95 and 13,541.78 is: 20,312.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.10 : 30,775.95 = 13,541.78 : x
  2. Step 2: Convert to fraction form
    20,517.10/30,775.95 = 13,541.78/x
  3. Step 3: Cross multiply
    20,517.10x = 30,775.95 × 13,541.78
  4. Step 4: Simplify right side
    20,517.10x = 416,761,221.13
  5. Step 5: Solve for x
    x = 416,761,221.13/20,517.10
  6. Step 6: Final answer
    x = 20,312.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.