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Finding the Fourth Proportional to 8,641.76, 12,965.68 and 4,262.32

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Solution

The fourth proportional to 8,641.76, 12,965.68 and 4,262.32 is: 6,394.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.76 : 12,965.68 = 4,262.32 : x
  2. Step 2: Convert to fraction form
    8,641.76/12,965.68 = 4,262.32/x
  3. Step 3: Cross multiply
    8,641.76x = 12,965.68 × 4,262.32
  4. Step 4: Simplify right side
    8,641.76x = 55,263,877.18
  5. Step 5: Solve for x
    x = 55,263,877.18/8,641.76
  6. Step 6: Final answer
    x = 6,394.98

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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.