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Finding the Fourth Proportional to 9.71, 14.46 and 9.15

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Solution

The fourth proportional to 9.71, 14.46 and 9.15 is: 13.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.71 : 14.46 = 9.15 : x
  2. Step 2: Convert to fraction form
    9.71/14.46 = 9.15/x
  3. Step 3: Cross multiply
    9.71x = 14.46 × 9.15
  4. Step 4: Simplify right side
    9.71x = 132.31
  5. Step 5: Solve for x
    x = 132.31/9.71
  6. Step 6: Final answer
    x = 13.63

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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.