Home / 13,254.20-18,279.78-7,947.80

Finding the Fourth Proportional to 13,254.20, 18,279.78 and 7,947.80

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Solution

The fourth proportional to 13,254.20, 18,279.78 and 7,947.80 is: 10,961.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,254.20 : 18,279.78 = 7,947.80 : x
  2. Step 2: Convert to fraction form
    13,254.20/18,279.78 = 7,947.80/x
  3. Step 3: Cross multiply
    13,254.20x = 18,279.78 × 7,947.80
  4. Step 4: Simplify right side
    13,254.20x = 145,284,035.48
  5. Step 5: Solve for x
    x = 145,284,035.48/13,254.20
  6. Step 6: Final answer
    x = 10,961.36

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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.