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Finding the Fourth Proportional to 10.27, 15.47 and 8.77

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Solution

The fourth proportional to 10.27, 15.47 and 8.77 is: 13.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.27 : 15.47 = 8.77 : x
  2. Step 2: Convert to fraction form
    10.27/15.47 = 8.77/x
  3. Step 3: Cross multiply
    10.27x = 15.47 × 8.77
  4. Step 4: Simplify right side
    10.27x = 135.55
  5. Step 5: Solve for x
    x = 135.55/10.27
  6. Step 6: Final answer
    x = 13.20

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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.