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Finding the Fourth Proportional to 28,115.88, 42,152.97 and 17,019.95

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Solution

The fourth proportional to 28,115.88, 42,152.97 and 17,019.95 is: 25,517.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.88 : 42,152.97 = 17,019.95 : x
  2. Step 2: Convert to fraction form
    28,115.88/42,152.97 = 17,019.95/x
  3. Step 3: Cross multiply
    28,115.88x = 42,152.97 × 17,019.95
  4. Step 4: Simplify right side
    28,115.88x = 717,441,294.81
  5. Step 5: Solve for x
    x = 717,441,294.81/28,115.88
  6. Step 6: Final answer
    x = 25,517.30

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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.