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Finding the Fourth Proportional to 15,047.12, 20,765.04 and 8,241.11

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Solution

The fourth proportional to 15,047.12, 20,765.04 and 8,241.11 is: 11,372.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.12 : 20,765.04 = 8,241.11 : x
  2. Step 2: Convert to fraction form
    15,047.12/20,765.04 = 8,241.11/x
  3. Step 3: Cross multiply
    15,047.12x = 20,765.04 × 8,241.11
  4. Step 4: Simplify right side
    15,047.12x = 171,126,978.79
  5. Step 5: Solve for x
    x = 171,126,978.79/15,047.12
  6. Step 6: Final answer
    x = 11,372.74

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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.