Home / 8,122.13-11,206.31-5,139.20

Finding the Fourth Proportional to 8,122.13, 11,206.31 and 5,139.20

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Solution

The fourth proportional to 8,122.13, 11,206.31 and 5,139.20 is: 7,090.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.13 : 11,206.31 = 5,139.20 : x
  2. Step 2: Convert to fraction form
    8,122.13/11,206.31 = 5,139.20/x
  3. Step 3: Cross multiply
    8,122.13x = 11,206.31 × 5,139.20
  4. Step 4: Simplify right side
    8,122.13x = 57,591,468.35
  5. Step 5: Solve for x
    x = 57,591,468.35/8,122.13
  6. Step 6: Final answer
    x = 7,090.69

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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.