Home / 7,947.24-11,921.10-6,649.80

Finding the Fourth Proportional to 7,947.24, 11,921.10 and 6,649.80

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Solution

The fourth proportional to 7,947.24, 11,921.10 and 6,649.80 is: 9,974.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,947.24 : 11,921.10 = 6,649.80 : x
  2. Step 2: Convert to fraction form
    7,947.24/11,921.10 = 6,649.80/x
  3. Step 3: Cross multiply
    7,947.24x = 11,921.10 × 6,649.80
  4. Step 4: Simplify right side
    7,947.24x = 79,272,930.78
  5. Step 5: Solve for x
    x = 79,272,930.78/7,947.24
  6. Step 6: Final answer
    x = 9,974.90

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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.