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Finding the Fourth Proportional to 8,478.85, 12,698.28 and 4,308.52

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Solution

The fourth proportional to 8,478.85, 12,698.28 and 4,308.52 is: 6,452.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.85 : 12,698.28 = 4,308.52 : x
  2. Step 2: Convert to fraction form
    8,478.85/12,698.28 = 4,308.52/x
  3. Step 3: Cross multiply
    8,478.85x = 12,698.28 × 4,308.52
  4. Step 4: Simplify right side
    8,478.85x = 54,710,793.35
  5. Step 5: Solve for x
    x = 54,710,793.35/8,478.85
  6. Step 6: Final answer
    x = 6,452.62

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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.