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Finding the Fourth Proportional to 8,587.80, 12,859.16 and 6,913.04

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Solution

The fourth proportional to 8,587.80, 12,859.16 and 6,913.04 is: 10,351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,587.80 : 12,859.16 = 6,913.04 : x
  2. Step 2: Convert to fraction form
    8,587.80/12,859.16 = 6,913.04/x
  3. Step 3: Cross multiply
    8,587.80x = 12,859.16 × 6,913.04
  4. Step 4: Simplify right side
    8,587.80x = 88,895,788.59
  5. Step 5: Solve for x
    x = 88,895,788.59/8,587.80
  6. Step 6: Final answer
    x = 10,351.40

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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.