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Finding the Fourth Proportional to 10,245.10, 15,373.61 and 4,321.61

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Solution

The fourth proportional to 10,245.10, 15,373.61 and 4,321.61 is: 6,484.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,245.10 : 15,373.61 = 4,321.61 : x
  2. Step 2: Convert to fraction form
    10,245.10/15,373.61 = 4,321.61/x
  3. Step 3: Cross multiply
    10,245.10x = 15,373.61 × 4,321.61
  4. Step 4: Simplify right side
    10,245.10x = 66,438,795.95
  5. Step 5: Solve for x
    x = 66,438,795.95/10,245.10
  6. Step 6: Final answer
    x = 6,484.94

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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.