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Finding the Fourth Proportional to 11.38, 15.72 and 11.35

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Solution

The fourth proportional to 11.38, 15.72 and 11.35 is: 15.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.38 : 15.72 = 11.35 : x
  2. Step 2: Convert to fraction form
    11.38/15.72 = 11.35/x
  3. Step 3: Cross multiply
    11.38x = 15.72 × 11.35
  4. Step 4: Simplify right side
    11.38x = 178.42
  5. Step 5: Solve for x
    x = 178.42/11.38
  6. Step 6: Final answer
    x = 15.68

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.