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Finding the Fourth Proportional to 10.35, 15.43 and 9.81

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Solution

The fourth proportional to 10.35, 15.43 and 9.81 is: 14.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.35 : 15.43 = 9.81 : x
  2. Step 2: Convert to fraction form
    10.35/15.43 = 9.81/x
  3. Step 3: Cross multiply
    10.35x = 15.43 × 9.81
  4. Step 4: Simplify right side
    10.35x = 151.37
  5. Step 5: Solve for x
    x = 151.37/10.35
  6. Step 6: Final answer
    x = 14.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.