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Finding the Fourth Proportional to 9.98, 15 and 8.49

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Solution

The fourth proportional to 9.98, 15 and 8.49 is: 12.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.98 : 15 = 8.49 : x
  2. Step 2: Convert to fraction form
    9.98/15 = 8.49/x
  3. Step 3: Cross multiply
    9.98x = 15 × 8.49
  4. Step 4: Simplify right side
    9.98x = 127.35
  5. Step 5: Solve for x
    x = 127.35/9.98
  6. Step 6: Final answer
    x = 12.76

Related Problems

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.