Home / 8,139.78-11,228.67-5,150.48

Finding the Fourth Proportional to 8,139.78, 11,228.67 and 5,150.48

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Solution

The fourth proportional to 8,139.78, 11,228.67 and 5,150.48 is: 7,104.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.78 : 11,228.67 = 5,150.48 : x
  2. Step 2: Convert to fraction form
    8,139.78/11,228.67 = 5,150.48/x
  3. Step 3: Cross multiply
    8,139.78x = 11,228.67 × 5,150.48
  4. Step 4: Simplify right side
    8,139.78x = 57,832,984.12
  5. Step 5: Solve for x
    x = 57,832,984.12/8,139.78
  6. Step 6: Final answer
    x = 7,104.98

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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.