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Finding the Fourth Proportional to 8,879.53, 12,255.16 and 5,342.74

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Solution

The fourth proportional to 8,879.53, 12,255.16 and 5,342.74 is: 7,373.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.53 : 12,255.16 = 5,342.74 : x
  2. Step 2: Convert to fraction form
    8,879.53/12,255.16 = 5,342.74/x
  3. Step 3: Cross multiply
    8,879.53x = 12,255.16 × 5,342.74
  4. Step 4: Simplify right side
    8,879.53x = 65,476,133.54
  5. Step 5: Solve for x
    x = 65,476,133.54/8,879.53
  6. Step 6: Final answer
    x = 7,373.83

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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.