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Finding the Fourth Proportional to 8,654.20, 12,985.40 and 4,491.99

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Solution

The fourth proportional to 8,654.20, 12,985.40 and 4,491.99 is: 6,740.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,654.20 : 12,985.40 = 4,491.99 : x
  2. Step 2: Convert to fraction form
    8,654.20/12,985.40 = 4,491.99/x
  3. Step 3: Cross multiply
    8,654.20x = 12,985.40 × 4,491.99
  4. Step 4: Simplify right side
    8,654.20x = 58,330,286.95
  5. Step 5: Solve for x
    x = 58,330,286.95/8,654.20
  6. Step 6: Final answer
    x = 6,740.11

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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.