Home / 18,215.70-25,139.52-11,146.80

Finding the Fourth Proportional to 18,215.70, 25,139.52 and 11,146.80

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Solution

The fourth proportional to 18,215.70, 25,139.52 and 11,146.80 is: 15,383.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,215.70 : 25,139.52 = 11,146.80 : x
  2. Step 2: Convert to fraction form
    18,215.70/25,139.52 = 11,146.80/x
  3. Step 3: Cross multiply
    18,215.70x = 25,139.52 × 11,146.80
  4. Step 4: Simplify right side
    18,215.70x = 280,225,201.54
  5. Step 5: Solve for x
    x = 280,225,201.54/18,215.70
  6. Step 6: Final answer
    x = 15,383.72

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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.