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Finding the Fourth Proportional to 10.57, 14.56 and 8.84

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Solution

The fourth proportional to 10.57, 14.56 and 8.84 is: 12.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.57 : 14.56 = 8.84 : x
  2. Step 2: Convert to fraction form
    10.57/14.56 = 8.84/x
  3. Step 3: Cross multiply
    10.57x = 14.56 × 8.84
  4. Step 4: Simplify right side
    10.57x = 128.71
  5. Step 5: Solve for x
    x = 128.71/10.57
  6. Step 6: Final answer
    x = 12.18

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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.