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Finding the Fourth Proportional to 8,920.32, 13,372.02 and 4,237.92

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Solution

The fourth proportional to 8,920.32, 13,372.02 and 4,237.92 is: 6,352.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.32 : 13,372.02 = 4,237.92 : x
  2. Step 2: Convert to fraction form
    8,920.32/13,372.02 = 4,237.92/x
  3. Step 3: Cross multiply
    8,920.32x = 13,372.02 × 4,237.92
  4. Step 4: Simplify right side
    8,920.32x = 56,669,551.00
  5. Step 5: Solve for x
    x = 56,669,551.00/8,920.32
  6. Step 6: Final answer
    x = 6,352.86

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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.