Home / 18,817.11-28,216.71-7,122.87

Finding the Fourth Proportional to 18,817.11, 28,216.71 and 7,122.87

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Solution

The fourth proportional to 18,817.11, 28,216.71 and 7,122.87 is: 10,680.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.11 : 28,216.71 = 7,122.87 : x
  2. Step 2: Convert to fraction form
    18,817.11/28,216.71 = 7,122.87/x
  3. Step 3: Cross multiply
    18,817.11x = 28,216.71 × 7,122.87
  4. Step 4: Simplify right side
    18,817.11x = 200,983,921.54
  5. Step 5: Solve for x
    x = 200,983,921.54/18,817.11
  6. Step 6: Final answer
    x = 10,680.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.