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Finding the Fourth Proportional to 8,619.50, 12,930.47 and 4,459.95

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Solution

The fourth proportional to 8,619.50, 12,930.47 and 4,459.95 is: 6,690.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.50 : 12,930.47 = 4,459.95 : x
  2. Step 2: Convert to fraction form
    8,619.50/12,930.47 = 4,459.95/x
  3. Step 3: Cross multiply
    8,619.50x = 12,930.47 × 4,459.95
  4. Step 4: Simplify right side
    8,619.50x = 57,669,227.38
  5. Step 5: Solve for x
    x = 57,669,227.38/8,619.50
  6. Step 6: Final answer
    x = 6,690.56

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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.