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Finding the Fourth Proportional to 11.60, 17.40 and 9.60

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Solution

The fourth proportional to 11.60, 17.40 and 9.60 is: 14.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.60 : 17.40 = 9.60 : x
  2. Step 2: Convert to fraction form
    11.60/17.40 = 9.60/x
  3. Step 3: Cross multiply
    11.60x = 17.40 × 9.60
  4. Step 4: Simplify right side
    11.60x = 167.04
  5. Step 5: Solve for x
    x = 167.04/11.60
  6. Step 6: Final answer
    x = 14.40

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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.