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Finding the Fourth Proportional to 25.32, 34.95 and 15.60

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Solution

The fourth proportional to 25.32, 34.95 and 15.60 is: 21.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.32 : 34.95 = 15.60 : x
  2. Step 2: Convert to fraction form
    25.32/34.95 = 15.60/x
  3. Step 3: Cross multiply
    25.32x = 34.95 × 15.60
  4. Step 4: Simplify right side
    25.32x = 545.22
  5. Step 5: Solve for x
    x = 545.22/25.32
  6. Step 6: Final answer
    x = 21.53

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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.