Home / 7,134.78-9,846.45-3,991.20

Finding the Fourth Proportional to 7,134.78, 9,846.45 and 3,991.20

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Solution

The fourth proportional to 7,134.78, 9,846.45 and 3,991.20 is: 5,508.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,134.78 : 9,846.45 = 3,991.20 : x
  2. Step 2: Convert to fraction form
    7,134.78/9,846.45 = 3,991.20/x
  3. Step 3: Cross multiply
    7,134.78x = 9,846.45 × 3,991.20
  4. Step 4: Simplify right side
    7,134.78x = 39,299,151.24
  5. Step 5: Solve for x
    x = 39,299,151.24/7,134.78
  6. Step 6: Final answer
    x = 5,508.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.