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Finding the Fourth Proportional to 37.80, 52.17 and 25.56

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Solution

The fourth proportional to 37.80, 52.17 and 25.56 is: 35.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.80 : 52.17 = 25.56 : x
  2. Step 2: Convert to fraction form
    37.80/52.17 = 25.56/x
  3. Step 3: Cross multiply
    37.80x = 52.17 × 25.56
  4. Step 4: Simplify right side
    37.80x = 1,333.47
  5. Step 5: Solve for x
    x = 1,333.47/37.80
  6. Step 6: Final answer
    x = 35.28

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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.