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Finding the Fourth Proportional to 10, 15.09 and 9.48

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Solution

The fourth proportional to 10, 15.09 and 9.48 is: 14.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10 : 15.09 = 9.48 : x
  2. Step 2: Convert to fraction form
    10/15.09 = 9.48/x
  3. Step 3: Cross multiply
    10x = 15.09 × 9.48
  4. Step 4: Simplify right side
    10x = 143.05
  5. Step 5: Solve for x
    x = 143.05/10
  6. Step 6: Final answer
    x = 14.31

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.