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Finding the Fourth Proportional to 11,393.72, 15,723.29 and 6,357.92

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Solution

The fourth proportional to 11,393.72, 15,723.29 and 6,357.92 is: 8,773.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.72 : 15,723.29 = 6,357.92 : x
  2. Step 2: Convert to fraction form
    11,393.72/15,723.29 = 6,357.92/x
  3. Step 3: Cross multiply
    11,393.72x = 15,723.29 × 6,357.92
  4. Step 4: Simplify right side
    11,393.72x = 99,967,309.55
  5. Step 5: Solve for x
    x = 99,967,309.55/11,393.72
  6. Step 6: Final answer
    x = 8,773.90

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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.