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Finding the Fourth Proportional to 39,807.70, 54,933.24 and 21,902.52

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Solution

The fourth proportional to 39,807.70, 54,933.24 and 21,902.52 is: 30,224.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,807.70 : 54,933.24 = 21,902.52 : x
  2. Step 2: Convert to fraction form
    39,807.70/54,933.24 = 21,902.52/x
  3. Step 3: Cross multiply
    39,807.70x = 54,933.24 × 21,902.52
  4. Step 4: Simplify right side
    39,807.70x = 1,203,176,387.76
  5. Step 5: Solve for x
    x = 1,203,176,387.76/39,807.70
  6. Step 6: Final answer
    x = 30,224.72

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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.