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Finding the Fourth Proportional to 10.86, 14.98 and 7.63

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Solution

The fourth proportional to 10.86, 14.98 and 7.63 is: 10.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.86 : 14.98 = 7.63 : x
  2. Step 2: Convert to fraction form
    10.86/14.98 = 7.63/x
  3. Step 3: Cross multiply
    10.86x = 14.98 × 7.63
  4. Step 4: Simplify right side
    10.86x = 114.30
  5. Step 5: Solve for x
    x = 114.30/10.86
  6. Step 6: Final answer
    x = 10.52

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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.