Home / 42,418.80-63,531.30-20,247.78

Finding the Fourth Proportional to 42,418.80, 63,531.30 and 20,247.78

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Solution

The fourth proportional to 42,418.80, 63,531.30 and 20,247.78 is: 30,325.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,418.80 : 63,531.30 = 20,247.78 : x
  2. Step 2: Convert to fraction form
    42,418.80/63,531.30 = 20,247.78/x
  3. Step 3: Cross multiply
    42,418.80x = 63,531.30 × 20,247.78
  4. Step 4: Simplify right side
    42,418.80x = 1,286,367,684.28
  5. Step 5: Solve for x
    x = 1,286,367,684.28/42,418.80
  6. Step 6: Final answer
    x = 30,325.42

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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.