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Finding the Fourth Proportional to 8,490.82, 12,734.40 and 5,326.73

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Solution

The fourth proportional to 8,490.82, 12,734.40 and 5,326.73 is: 7,988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.82 : 12,734.40 = 5,326.73 : x
  2. Step 2: Convert to fraction form
    8,490.82/12,734.40 = 5,326.73/x
  3. Step 3: Cross multiply
    8,490.82x = 12,734.40 × 5,326.73
  4. Step 4: Simplify right side
    8,490.82x = 67,832,755.66
  5. Step 5: Solve for x
    x = 67,832,755.66/8,490.82
  6. Step 6: Final answer
    x = 7,988.95

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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.