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Finding the Fourth Proportional to 7.69, 10.60 and 7.47

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Solution

The fourth proportional to 7.69, 10.60 and 7.47 is: 10.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.69 : 10.60 = 7.47 : x
  2. Step 2: Convert to fraction form
    7.69/10.60 = 7.47/x
  3. Step 3: Cross multiply
    7.69x = 10.60 × 7.47
  4. Step 4: Simplify right side
    7.69x = 79.15
  5. Step 5: Solve for x
    x = 79.15/7.69
  6. Step 6: Final answer
    x = 10.29

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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.