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Finding the Fourth Proportional to 11,279, 15,565.14 and 6,243.32

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Solution

The fourth proportional to 11,279, 15,565.14 and 6,243.32 is: 8,615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,279 : 15,565.14 = 6,243.32 : x
  2. Step 2: Convert to fraction form
    11,279/15,565.14 = 6,243.32/x
  3. Step 3: Cross multiply
    11,279x = 15,565.14 × 6,243.32
  4. Step 4: Simplify right side
    11,279x = 97,178,149.86
  5. Step 5: Solve for x
    x = 97,178,149.86/11,279
  6. Step 6: Final answer
    x = 8,615.85

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1.5x scale

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.