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Finding the Fourth Proportional to 30.76, 42.50 and 26.44

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Solution

The fourth proportional to 30.76, 42.50 and 26.44 is: 36.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.76 : 42.50 = 26.44 : x
  2. Step 2: Convert to fraction form
    30.76/42.50 = 26.44/x
  3. Step 3: Cross multiply
    30.76x = 42.50 × 26.44
  4. Step 4: Simplify right side
    30.76x = 1,123.70
  5. Step 5: Solve for x
    x = 1,123.70/30.76
  6. Step 6: Final answer
    x = 36.53

Related Problems

Find fourth proportional to 15.38, 21.25 and 13.22
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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.