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Finding the Fourth Proportional to 28,482, 42,721.71 and 8,759.70

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Solution

The fourth proportional to 28,482, 42,721.71 and 8,759.70 is: 13,139.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,482 : 42,721.71 = 8,759.70 : x
  2. Step 2: Convert to fraction form
    28,482/42,721.71 = 8,759.70/x
  3. Step 3: Cross multiply
    28,482x = 42,721.71 × 8,759.70
  4. Step 4: Simplify right side
    28,482x = 374,229,363.09
  5. Step 5: Solve for x
    x = 374,229,363.09/28,482
  6. Step 6: Final answer
    x = 13,139.15

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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.