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Finding the Fourth Proportional to 8,671.97, 12,988.04 and 5,509.18

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Solution

The fourth proportional to 8,671.97, 12,988.04 and 5,509.18 is: 8,251.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.97 : 12,988.04 = 5,509.18 : x
  2. Step 2: Convert to fraction form
    8,671.97/12,988.04 = 5,509.18/x
  3. Step 3: Cross multiply
    8,671.97x = 12,988.04 × 5,509.18
  4. Step 4: Simplify right side
    8,671.97x = 71,553,450.21
  5. Step 5: Solve for x
    x = 71,553,450.21/8,671.97
  6. Step 6: Final answer
    x = 8,251.12

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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.