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Finding the Fourth Proportional to 12,921.92, 17,832.48 and 7,332.32

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Solution

The fourth proportional to 12,921.92, 17,832.48 and 7,332.32 is: 10,118.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.92 : 17,832.48 = 7,332.32 : x
  2. Step 2: Convert to fraction form
    12,921.92/17,832.48 = 7,332.32/x
  3. Step 3: Cross multiply
    12,921.92x = 17,832.48 × 7,332.32
  4. Step 4: Simplify right side
    12,921.92x = 130,753,449.75
  5. Step 5: Solve for x
    x = 130,753,449.75/12,921.92
  6. Step 6: Final answer
    x = 10,118.73

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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.