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Finding the Fourth Proportional to 12,281.70, 18,422.55 and 4,493.55

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Solution

The fourth proportional to 12,281.70, 18,422.55 and 4,493.55 is: 6,740.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.70 : 18,422.55 = 4,493.55 : x
  2. Step 2: Convert to fraction form
    12,281.70/18,422.55 = 4,493.55/x
  3. Step 3: Cross multiply
    12,281.70x = 18,422.55 × 4,493.55
  4. Step 4: Simplify right side
    12,281.70x = 82,782,649.55
  5. Step 5: Solve for x
    x = 82,782,649.55/12,281.70
  6. Step 6: Final answer
    x = 6,740.33

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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.