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Finding the Fourth Proportional to 8,815.86, 13,217.88 and 4,651.47

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Solution

The fourth proportional to 8,815.86, 13,217.88 and 4,651.47 is: 6,974.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.86 : 13,217.88 = 4,651.47 : x
  2. Step 2: Convert to fraction form
    8,815.86/13,217.88 = 4,651.47/x
  3. Step 3: Cross multiply
    8,815.86x = 13,217.88 × 4,651.47
  4. Step 4: Simplify right side
    8,815.86x = 61,482,572.28
  5. Step 5: Solve for x
    x = 61,482,572.28/8,815.86
  6. Step 6: Final answer
    x = 6,974.09

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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.