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Finding the Fourth Proportional to 28,189.62, 42,281.07 and 7,414.74

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Solution

The fourth proportional to 28,189.62, 42,281.07 and 7,414.74 is: 11,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.62 : 42,281.07 = 7,414.74 : x
  2. Step 2: Convert to fraction form
    28,189.62/42,281.07 = 7,414.74/x
  3. Step 3: Cross multiply
    28,189.62x = 42,281.07 × 7,414.74
  4. Step 4: Simplify right side
    28,189.62x = 313,503,140.97
  5. Step 5: Solve for x
    x = 313,503,140.97/28,189.62
  6. Step 6: Final answer
    x = 11,121.23

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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.