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Finding the Fourth Proportional to 10,920.30, 15,062.67 and 7,377.90

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Solution

The fourth proportional to 10,920.30, 15,062.67 and 7,377.90 is: 10,176.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.30 : 15,062.67 = 7,377.90 : x
  2. Step 2: Convert to fraction form
    10,920.30/15,062.67 = 7,377.90/x
  3. Step 3: Cross multiply
    10,920.30x = 15,062.67 × 7,377.90
  4. Step 4: Simplify right side
    10,920.30x = 111,130,872.99
  5. Step 5: Solve for x
    x = 111,130,872.99/10,920.30
  6. Step 6: Final answer
    x = 10,176.54

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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.