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Finding the Fourth Proportional to 28,482.39, 42,730.88 and 8,761.12

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Solution

The fourth proportional to 28,482.39, 42,730.88 and 8,761.12 is: 13,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,482.39 : 42,730.88 = 8,761.12 : x
  2. Step 2: Convert to fraction form
    28,482.39/42,730.88 = 8,761.12/x
  3. Step 3: Cross multiply
    28,482.39x = 42,730.88 × 8,761.12
  4. Step 4: Simplify right side
    28,482.39x = 374,370,367.39
  5. Step 5: Solve for x
    x = 374,370,367.39/28,482.39
  6. Step 6: Final answer
    x = 13,143.92

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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.