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Finding the Fourth Proportional to 8,442.72, 12,663 and 2,599.20

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Solution

The fourth proportional to 8,442.72, 12,663 and 2,599.20 is: 3,898.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,442.72 : 12,663 = 2,599.20 : x
  2. Step 2: Convert to fraction form
    8,442.72/12,663 = 2,599.20/x
  3. Step 3: Cross multiply
    8,442.72x = 12,663 × 2,599.20
  4. Step 4: Simplify right side
    8,442.72x = 32,913,669.60
  5. Step 5: Solve for x
    x = 32,913,669.60/8,442.72
  6. Step 6: Final answer
    x = 3,898.47

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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.