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Finding the Fourth Proportional to 38,932.80, 53,728.37 and 21,937.20

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Solution

The fourth proportional to 38,932.80, 53,728.37 and 21,937.20 is: 30,273.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,932.80 : 53,728.37 = 21,937.20 : x
  2. Step 2: Convert to fraction form
    38,932.80/53,728.37 = 21,937.20/x
  3. Step 3: Cross multiply
    38,932.80x = 53,728.37 × 21,937.20
  4. Step 4: Simplify right side
    38,932.80x = 1,178,649,998.36
  5. Step 5: Solve for x
    x = 1,178,649,998.36/38,932.80
  6. Step 6: Final answer
    x = 30,273.96

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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.