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Finding the Fourth Proportional to 10,608.40, 15,912.60 and 10,349.20

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Solution

The fourth proportional to 10,608.40, 15,912.60 and 10,349.20 is: 15,523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,608.40 : 15,912.60 = 10,349.20 : x
  2. Step 2: Convert to fraction form
    10,608.40/15,912.60 = 10,349.20/x
  3. Step 3: Cross multiply
    10,608.40x = 15,912.60 × 10,349.20
  4. Step 4: Simplify right side
    10,608.40x = 164,682,679.92
  5. Step 5: Solve for x
    x = 164,682,679.92/10,608.40
  6. Step 6: Final answer
    x = 15,523.80

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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.