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Finding the Fourth Proportional to 9.39, 14 and 9.30

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Solution

The fourth proportional to 9.39, 14 and 9.30 is: 13.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.39 : 14 = 9.30 : x
  2. Step 2: Convert to fraction form
    9.39/14 = 9.30/x
  3. Step 3: Cross multiply
    9.39x = 14 × 9.30
  4. Step 4: Simplify right side
    9.39x = 130.20
  5. Step 5: Solve for x
    x = 130.20/9.39
  6. Step 6: Final answer
    x = 13.87

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Similar ratio
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1.5x scale

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.