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Finding the Fourth Proportional to 25.12, 37.54 and 21.52

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Solution

The fourth proportional to 25.12, 37.54 and 21.52 is: 32.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.12 : 37.54 = 21.52 : x
  2. Step 2: Convert to fraction form
    25.12/37.54 = 21.52/x
  3. Step 3: Cross multiply
    25.12x = 37.54 × 21.52
  4. Step 4: Simplify right side
    25.12x = 807.86
  5. Step 5: Solve for x
    x = 807.86/25.12
  6. Step 6: Final answer
    x = 32.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.