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Finding the Fourth Proportional to 38,508.75, 53,142.08 and 20,844.75

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Solution

The fourth proportional to 38,508.75, 53,142.08 and 20,844.75 is: 28,765.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,508.75 : 53,142.08 = 20,844.75 : x
  2. Step 2: Convert to fraction form
    38,508.75/53,142.08 = 20,844.75/x
  3. Step 3: Cross multiply
    38,508.75x = 53,142.08 × 20,844.75
  4. Step 4: Simplify right side
    38,508.75x = 1,107,733,267.86
  5. Step 5: Solve for x
    x = 1,107,733,267.86/38,508.75
  6. Step 6: Final answer
    x = 28,765.76

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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.