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Finding the Fourth Proportional to 28,503.25, 42,760.55 and 8,780.97

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Solution

The fourth proportional to 28,503.25, 42,760.55 and 8,780.97 is: 13,173.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,503.25 : 42,760.55 = 8,780.97 : x
  2. Step 2: Convert to fraction form
    28,503.25/42,760.55 = 8,780.97/x
  3. Step 3: Cross multiply
    28,503.25x = 42,760.55 × 8,780.97
  4. Step 4: Simplify right side
    28,503.25x = 375,479,106.73
  5. Step 5: Solve for x
    x = 375,479,106.73/28,503.25
  6. Step 6: Final answer
    x = 13,173.20

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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.