Home / 10,129.28-15,190.32-3,889.76

Finding the Fourth Proportional to 10,129.28, 15,190.32 and 3,889.76

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Solution

The fourth proportional to 10,129.28, 15,190.32 and 3,889.76 is: 5,833.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.28 : 15,190.32 = 3,889.76 : x
  2. Step 2: Convert to fraction form
    10,129.28/15,190.32 = 3,889.76/x
  3. Step 3: Cross multiply
    10,129.28x = 15,190.32 × 3,889.76
  4. Step 4: Simplify right side
    10,129.28x = 59,086,699.12
  5. Step 5: Solve for x
    x = 59,086,699.12/10,129.28
  6. Step 6: Final answer
    x = 5,833.26

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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.