Home / 42,487.20-63,641.57-20,278.22

Finding the Fourth Proportional to 42,487.20, 63,641.57 and 20,278.22

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Solution

The fourth proportional to 42,487.20, 63,641.57 and 20,278.22 is: 30,374.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,487.20 : 63,641.57 = 20,278.22 : x
  2. Step 2: Convert to fraction form
    42,487.20/63,641.57 = 20,278.22/x
  3. Step 3: Cross multiply
    42,487.20x = 63,641.57 × 20,278.22
  4. Step 4: Simplify right side
    42,487.20x = 1,290,537,338.01
  5. Step 5: Solve for x
    x = 1,290,537,338.01/42,487.20
  6. Step 6: Final answer
    x = 30,374.73

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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.