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Finding the Fourth Proportional to 14.85, 20.51 and 10.02

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Solution

The fourth proportional to 14.85, 20.51 and 10.02 is: 13.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.85 : 20.51 = 10.02 : x
  2. Step 2: Convert to fraction form
    14.85/20.51 = 10.02/x
  3. Step 3: Cross multiply
    14.85x = 20.51 × 10.02
  4. Step 4: Simplify right side
    14.85x = 205.46
  5. Step 5: Solve for x
    x = 205.46/14.85
  6. Step 6: Final answer
    x = 13.84

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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.