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Finding the Fourth Proportional to 25,927.20, 38,833.20 and 21,319.20

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Solution

The fourth proportional to 25,927.20, 38,833.20 and 21,319.20 is: 31,931.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,927.20 : 38,833.20 = 21,319.20 : x
  2. Step 2: Convert to fraction form
    25,927.20/38,833.20 = 21,319.20/x
  3. Step 3: Cross multiply
    25,927.20x = 38,833.20 × 21,319.20
  4. Step 4: Simplify right side
    25,927.20x = 827,892,757.44
  5. Step 5: Solve for x
    x = 827,892,757.44/25,927.20
  6. Step 6: Final answer
    x = 31,931.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.