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Finding the Fourth Proportional to 10.14, 13.99 and 8.69

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Solution

The fourth proportional to 10.14, 13.99 and 8.69 is: 11.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.14 : 13.99 = 8.69 : x
  2. Step 2: Convert to fraction form
    10.14/13.99 = 8.69/x
  3. Step 3: Cross multiply
    10.14x = 13.99 × 8.69
  4. Step 4: Simplify right side
    10.14x = 121.58
  5. Step 5: Solve for x
    x = 121.58/10.14
  6. Step 6: Final answer
    x = 11.99

Related Problems

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Double scale
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1.5x scale

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.