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Finding the Fourth Proportional to 30.76, 46.16 and 15.53

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Solution

The fourth proportional to 30.76, 46.16 and 15.53 is: 23.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.76 : 46.16 = 15.53 : x
  2. Step 2: Convert to fraction form
    30.76/46.16 = 15.53/x
  3. Step 3: Cross multiply
    30.76x = 46.16 × 15.53
  4. Step 4: Simplify right side
    30.76x = 716.86
  5. Step 5: Solve for x
    x = 716.86/30.76
  6. Step 6: Final answer
    x = 23.31

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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.