Home / 8,125.74-11,215.26-5,139.72

Finding the Fourth Proportional to 8,125.74, 11,215.26 and 5,139.72

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Solution

The fourth proportional to 8,125.74, 11,215.26 and 5,139.72 is: 7,093.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.74 : 11,215.26 = 5,139.72 : x
  2. Step 2: Convert to fraction form
    8,125.74/11,215.26 = 5,139.72/x
  3. Step 3: Cross multiply
    8,125.74x = 11,215.26 × 5,139.72
  4. Step 4: Simplify right side
    8,125.74x = 57,643,296.13
  5. Step 5: Solve for x
    x = 57,643,296.13/8,125.74
  6. Step 6: Final answer
    x = 7,093.91

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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.