Home / 11,139.15-15,371.56-6,660.26

Finding the Fourth Proportional to 11,139.15, 15,371.56 and 6,660.26

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Solution

The fourth proportional to 11,139.15, 15,371.56 and 6,660.26 is: 9,190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.15 : 15,371.56 = 6,660.26 : x
  2. Step 2: Convert to fraction form
    11,139.15/15,371.56 = 6,660.26/x
  3. Step 3: Cross multiply
    11,139.15x = 15,371.56 × 6,660.26
  4. Step 4: Simplify right side
    11,139.15x = 102,378,509.35
  5. Step 5: Solve for x
    x = 102,378,509.35/11,139.15
  6. Step 6: Final answer
    x = 9,190.87

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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.