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Finding the Fourth Proportional to 43,321.50, 64,982.25 and 10,489.50

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Solution

The fourth proportional to 43,321.50, 64,982.25 and 10,489.50 is: 15,734.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,321.50 : 64,982.25 = 10,489.50 : x
  2. Step 2: Convert to fraction form
    43,321.50/64,982.25 = 10,489.50/x
  3. Step 3: Cross multiply
    43,321.50x = 64,982.25 × 10,489.50
  4. Step 4: Simplify right side
    43,321.50x = 681,631,311.38
  5. Step 5: Solve for x
    x = 681,631,311.38/43,321.50
  6. Step 6: Final answer
    x = 15,734.25

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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.