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Finding the Fourth Proportional to 9,332.72, 12,879.28 and 5,353.68

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Solution

The fourth proportional to 9,332.72, 12,879.28 and 5,353.68 is: 7,388.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,332.72 : 12,879.28 = 5,353.68 : x
  2. Step 2: Convert to fraction form
    9,332.72/12,879.28 = 5,353.68/x
  3. Step 3: Cross multiply
    9,332.72x = 12,879.28 × 5,353.68
  4. Step 4: Simplify right side
    9,332.72x = 68,951,543.75
  5. Step 5: Solve for x
    x = 68,951,543.75/9,332.72
  6. Step 6: Final answer
    x = 7,388.15

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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.