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Finding the Fourth Proportional to 8,900, 12,281.52 and 4,920.89

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Solution

The fourth proportional to 8,900, 12,281.52 and 4,920.89 is: 6,790.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,900 : 12,281.52 = 4,920.89 : x
  2. Step 2: Convert to fraction form
    8,900/12,281.52 = 4,920.89/x
  3. Step 3: Cross multiply
    8,900x = 12,281.52 × 4,920.89
  4. Step 4: Simplify right side
    8,900x = 60,436,008.95
  5. Step 5: Solve for x
    x = 60,436,008.95/8,900
  6. Step 6: Final answer
    x = 6,790.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.