Home / 18,221.14-27,331.71-7,128.19

Finding the Fourth Proportional to 18,221.14, 27,331.71 and 7,128.19

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Solution

The fourth proportional to 18,221.14, 27,331.71 and 7,128.19 is: 10,692.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.14 : 27,331.71 = 7,128.19 : x
  2. Step 2: Convert to fraction form
    18,221.14/27,331.71 = 7,128.19/x
  3. Step 3: Cross multiply
    18,221.14x = 27,331.71 × 7,128.19
  4. Step 4: Simplify right side
    18,221.14x = 194,825,621.90
  5. Step 5: Solve for x
    x = 194,825,621.90/18,221.14
  6. Step 6: Final answer
    x = 10,692.29

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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.