Home / 13,947.60-20,921.40-5,180.70

Finding the Fourth Proportional to 13,947.60, 20,921.40 and 5,180.70

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Solution

The fourth proportional to 13,947.60, 20,921.40 and 5,180.70 is: 7,771.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.60 : 20,921.40 = 5,180.70 : x
  2. Step 2: Convert to fraction form
    13,947.60/20,921.40 = 5,180.70/x
  3. Step 3: Cross multiply
    13,947.60x = 20,921.40 × 5,180.70
  4. Step 4: Simplify right side
    13,947.60x = 108,387,496.98
  5. Step 5: Solve for x
    x = 108,387,496.98/13,947.60
  6. Step 6: Final answer
    x = 7,771.05

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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.