Home / 10,122.56-15,189.60-8,083.52

Finding the Fourth Proportional to 10,122.56, 15,189.60 and 8,083.52

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Solution

The fourth proportional to 10,122.56, 15,189.60 and 8,083.52 is: 12,129.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,122.56 : 15,189.60 = 8,083.52 : x
  2. Step 2: Convert to fraction form
    10,122.56/15,189.60 = 8,083.52/x
  3. Step 3: Cross multiply
    10,122.56x = 15,189.60 × 8,083.52
  4. Step 4: Simplify right side
    10,122.56x = 122,785,435.39
  5. Step 5: Solve for x
    x = 122,785,435.39/10,122.56
  6. Step 6: Final answer
    x = 12,129.88

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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.