Home / 28,375.91-42,560.87-12,581.21

Finding the Fourth Proportional to 28,375.91, 42,560.87 and 12,581.21

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Solution

The fourth proportional to 28,375.91, 42,560.87 and 12,581.21 is: 18,870.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.91 : 42,560.87 = 12,581.21 : x
  2. Step 2: Convert to fraction form
    28,375.91/42,560.87 = 12,581.21/x
  3. Step 3: Cross multiply
    28,375.91x = 42,560.87 × 12,581.21
  4. Step 4: Simplify right side
    28,375.91x = 535,466,967.54
  5. Step 5: Solve for x
    x = 535,466,967.54/28,375.91
  6. Step 6: Final answer
    x = 18,870.48

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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.