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Finding the Fourth Proportional to 30.76, 42.48 and 23.48

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Solution

The fourth proportional to 30.76, 42.48 and 23.48 is: 32.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.76 : 42.48 = 23.48 : x
  2. Step 2: Convert to fraction form
    30.76/42.48 = 23.48/x
  3. Step 3: Cross multiply
    30.76x = 42.48 × 23.48
  4. Step 4: Simplify right side
    30.76x = 997.43
  5. Step 5: Solve for x
    x = 997.43/30.76
  6. Step 6: Final answer
    x = 32.43

Related Problems

Find fourth proportional to 15.38, 21.24 and 11.74
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Double scale
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1.5x scale

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.