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Finding the Fourth Proportional to 22.47, 31 and 15.19

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Solution

The fourth proportional to 22.47, 31 and 15.19 is: 20.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.47 : 31 = 15.19 : x
  2. Step 2: Convert to fraction form
    22.47/31 = 15.19/x
  3. Step 3: Cross multiply
    22.47x = 31 × 15.19
  4. Step 4: Simplify right side
    22.47x = 470.89
  5. Step 5: Solve for x
    x = 470.89/22.47
  6. Step 6: Final answer
    x = 20.96

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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.