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Finding the Fourth Proportional to 8,728.91, 12,042.15 and 6,832.88

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Solution

The fourth proportional to 8,728.91, 12,042.15 and 6,832.88 is: 9,426.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.91 : 12,042.15 = 6,832.88 : x
  2. Step 2: Convert to fraction form
    8,728.91/12,042.15 = 6,832.88/x
  3. Step 3: Cross multiply
    8,728.91x = 12,042.15 × 6,832.88
  4. Step 4: Simplify right side
    8,728.91x = 82,282,597.52
  5. Step 5: Solve for x
    x = 82,282,597.52/8,728.91
  6. Step 6: Final answer
    x = 9,426.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.