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Finding the Fourth Proportional to 25.53, 35.08 and 21.43

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Solution

The fourth proportional to 25.53, 35.08 and 21.43 is: 29.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.53 : 35.08 = 21.43 : x
  2. Step 2: Convert to fraction form
    25.53/35.08 = 21.43/x
  3. Step 3: Cross multiply
    25.53x = 35.08 × 21.43
  4. Step 4: Simplify right side
    25.53x = 751.76
  5. Step 5: Solve for x
    x = 751.76/25.53
  6. Step 6: Final answer
    x = 29.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.