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Finding the Fourth Proportional to 10,904.85, 15,053.31 and 7,372.85

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Solution

The fourth proportional to 10,904.85, 15,053.31 and 7,372.85 is: 10,177.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,904.85 : 15,053.31 = 7,372.85 : x
  2. Step 2: Convert to fraction form
    10,904.85/15,053.31 = 7,372.85/x
  3. Step 3: Cross multiply
    10,904.85x = 15,053.31 × 7,372.85
  4. Step 4: Simplify right side
    10,904.85x = 110,985,721.37
  5. Step 5: Solve for x
    x = 110,985,721.37/10,904.85
  6. Step 6: Final answer
    x = 10,177.65

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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.