Home / 28,115.89-42,152.76-17,019.90

Finding the Fourth Proportional to 28,115.89, 42,152.76 and 17,019.90

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Solution

The fourth proportional to 28,115.89, 42,152.76 and 17,019.90 is: 25,517.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.89 : 42,152.76 = 17,019.90 : x
  2. Step 2: Convert to fraction form
    28,115.89/42,152.76 = 17,019.90/x
  3. Step 3: Cross multiply
    28,115.89x = 42,152.76 × 17,019.90
  4. Step 4: Simplify right side
    28,115.89x = 717,435,759.92
  5. Step 5: Solve for x
    x = 717,435,759.92/28,115.89
  6. Step 6: Final answer
    x = 25,517.09

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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.