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Finding the Fourth Proportional to 9.57, 14.38 and 8.60

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Solution

The fourth proportional to 9.57, 14.38 and 8.60 is: 12.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.57 : 14.38 = 8.60 : x
  2. Step 2: Convert to fraction form
    9.57/14.38 = 8.60/x
  3. Step 3: Cross multiply
    9.57x = 14.38 × 8.60
  4. Step 4: Simplify right side
    9.57x = 123.57
  5. Step 5: Solve for x
    x = 123.57/9.57
  6. Step 6: Final answer
    x = 12.91

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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.