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Finding the Fourth Proportional to 8,619.52, 12,930.69 and 4,237.42

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Solution

The fourth proportional to 8,619.52, 12,930.69 and 4,237.42 is: 6,356.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.52 : 12,930.69 = 4,237.42 : x
  2. Step 2: Convert to fraction form
    8,619.52/12,930.69 = 4,237.42/x
  3. Step 3: Cross multiply
    8,619.52x = 12,930.69 × 4,237.42
  4. Step 4: Simplify right side
    8,619.52x = 54,792,699.77
  5. Step 5: Solve for x
    x = 54,792,699.77/8,619.52
  6. Step 6: Final answer
    x = 6,356.82

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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.