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Finding the Fourth Proportional to 8,691, 12,003.48 and 5,891.64

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Solution

The fourth proportional to 8,691, 12,003.48 and 5,891.64 is: 8,137.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691 : 12,003.48 = 5,891.64 : x
  2. Step 2: Convert to fraction form
    8,691/12,003.48 = 5,891.64/x
  3. Step 3: Cross multiply
    8,691x = 12,003.48 × 5,891.64
  4. Step 4: Simplify right side
    8,691x = 70,720,182.91
  5. Step 5: Solve for x
    x = 70,720,182.91/8,691
  6. Step 6: Final answer
    x = 8,137.17

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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.