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Finding the Fourth Proportional to 38,662.92, 53,462.16 and 30,691.20

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Solution

The fourth proportional to 38,662.92, 53,462.16 and 30,691.20 is: 42,439.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,662.92 : 53,462.16 = 30,691.20 : x
  2. Step 2: Convert to fraction form
    38,662.92/53,462.16 = 30,691.20/x
  3. Step 3: Cross multiply
    38,662.92x = 53,462.16 × 30,691.20
  4. Step 4: Simplify right side
    38,662.92x = 1,640,817,844.99
  5. Step 5: Solve for x
    x = 1,640,817,844.99/38,662.92
  6. Step 6: Final answer
    x = 42,439.06

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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.