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Finding the Fourth Proportional to 30.75, 46.14 and 10.47

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Solution

The fourth proportional to 30.75, 46.14 and 10.47 is: 15.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.75 : 46.14 = 10.47 : x
  2. Step 2: Convert to fraction form
    30.75/46.14 = 10.47/x
  3. Step 3: Cross multiply
    30.75x = 46.14 × 10.47
  4. Step 4: Simplify right side
    30.75x = 483.09
  5. Step 5: Solve for x
    x = 483.09/30.75
  6. Step 6: Final answer
    x = 15.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.