Home / 12,320.57-18,481.87-4,920.99

Finding the Fourth Proportional to 12,320.57, 18,481.87 and 4,920.99

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Solution

The fourth proportional to 12,320.57, 18,481.87 and 4,920.99 is: 7,381.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.57 : 18,481.87 = 4,920.99 : x
  2. Step 2: Convert to fraction form
    12,320.57/18,481.87 = 4,920.99/x
  3. Step 3: Cross multiply
    12,320.57x = 18,481.87 × 4,920.99
  4. Step 4: Simplify right side
    12,320.57x = 90,949,034.30
  5. Step 5: Solve for x
    x = 90,949,034.30/12,320.57
  6. Step 6: Final answer
    x = 7,381.88

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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.