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Finding the Fourth Proportional to 28,229.41, 42,344.12 and 7,171.03

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Solution

The fourth proportional to 28,229.41, 42,344.12 and 7,171.03 is: 10,756.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.41 : 42,344.12 = 7,171.03 : x
  2. Step 2: Convert to fraction form
    28,229.41/42,344.12 = 7,171.03/x
  3. Step 3: Cross multiply
    28,229.41x = 42,344.12 × 7,171.03
  4. Step 4: Simplify right side
    28,229.41x = 303,650,954.84
  5. Step 5: Solve for x
    x = 303,650,954.84/28,229.41
  6. Step 6: Final answer
    x = 10,756.55

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Half scale
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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.