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Finding the Fourth Proportional to 45, 67.47 and 14.56

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Solution

The fourth proportional to 45, 67.47 and 14.56 is: 21.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    45 : 67.47 = 14.56 : x
  2. Step 2: Convert to fraction form
    45/67.47 = 14.56/x
  3. Step 3: Cross multiply
    45x = 67.47 × 14.56
  4. Step 4: Simplify right side
    45x = 982.22
  5. Step 5: Solve for x
    x = 982.22/45
  6. Step 6: Final answer
    x = 21.83

Related Problems

Find fourth proportional to 22.50, 33.74 and 7.28
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Double scale
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Similar ratio
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1.5x scale

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.