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Finding the Fourth Proportional to 8,920.73, 13,385.15 and 4,761.74

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Solution

The fourth proportional to 8,920.73, 13,385.15 and 4,761.74 is: 7,144.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.73 : 13,385.15 = 4,761.74 : x
  2. Step 2: Convert to fraction form
    8,920.73/13,385.15 = 4,761.74/x
  3. Step 3: Cross multiply
    8,920.73x = 13,385.15 × 4,761.74
  4. Step 4: Simplify right side
    8,920.73x = 63,736,604.16
  5. Step 5: Solve for x
    x = 63,736,604.16/8,920.73
  6. Step 6: Final answer
    x = 7,144.77

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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.