Home / 15,189.38-20,961.36-8,901.75

Finding the Fourth Proportional to 15,189.38, 20,961.36 and 8,901.75

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Solution

The fourth proportional to 15,189.38, 20,961.36 and 8,901.75 is: 12,284.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189.38 : 20,961.36 = 8,901.75 : x
  2. Step 2: Convert to fraction form
    15,189.38/20,961.36 = 8,901.75/x
  3. Step 3: Cross multiply
    15,189.38x = 20,961.36 × 8,901.75
  4. Step 4: Simplify right side
    15,189.38x = 186,592,786.38
  5. Step 5: Solve for x
    x = 186,592,786.38/15,189.38
  6. Step 6: Final answer
    x = 12,284.42

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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.