Home / 13,947.70-20,921.55-8,757.22

Finding the Fourth Proportional to 13,947.70, 20,921.55 and 8,757.22

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Solution

The fourth proportional to 13,947.70, 20,921.55 and 8,757.22 is: 13,135.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.70 : 20,921.55 = 8,757.22 : x
  2. Step 2: Convert to fraction form
    13,947.70/20,921.55 = 8,757.22/x
  3. Step 3: Cross multiply
    13,947.70x = 20,921.55 × 8,757.22
  4. Step 4: Simplify right side
    13,947.70x = 183,214,616.09
  5. Step 5: Solve for x
    x = 183,214,616.09/13,947.70
  6. Step 6: Final answer
    x = 13,135.83

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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.