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Finding the Fourth Proportional to 38,338.90, 52,909.20 and 21,343.90

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Solution

The fourth proportional to 38,338.90, 52,909.20 and 21,343.90 is: 29,455.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,338.90 : 52,909.20 = 21,343.90 : x
  2. Step 2: Convert to fraction form
    38,338.90/52,909.20 = 21,343.90/x
  3. Step 3: Cross multiply
    38,338.90x = 52,909.20 × 21,343.90
  4. Step 4: Simplify right side
    38,338.90x = 1,129,288,673.88
  5. Step 5: Solve for x
    x = 1,129,288,673.88/38,338.90
  6. Step 6: Final answer
    x = 29,455.43

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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.