Home / 13,947.62-20,921.43-4,086.90

Finding the Fourth Proportional to 13,947.62, 20,921.43 and 4,086.90

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Solution

The fourth proportional to 13,947.62, 20,921.43 and 4,086.90 is: 6,130.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.62 : 20,921.43 = 4,086.90 : x
  2. Step 2: Convert to fraction form
    13,947.62/20,921.43 = 4,086.90/x
  3. Step 3: Cross multiply
    13,947.62x = 20,921.43 × 4,086.90
  4. Step 4: Simplify right side
    13,947.62x = 85,503,667.23
  5. Step 5: Solve for x
    x = 85,503,667.23/13,947.62
  6. Step 6: Final answer
    x = 6,130.34

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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.