Home / 3,947.80-5,447.26-2,269.12

Finding the Fourth Proportional to 3,947.80, 5,447.26 and 2,269.12

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Solution

The fourth proportional to 3,947.80, 5,447.26 and 2,269.12 is: 3,130.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.80 : 5,447.26 = 2,269.12 : x
  2. Step 2: Convert to fraction form
    3,947.80/5,447.26 = 2,269.12/x
  3. Step 3: Cross multiply
    3,947.80x = 5,447.26 × 2,269.12
  4. Step 4: Simplify right side
    3,947.80x = 12,360,486.61
  5. Step 5: Solve for x
    x = 12,360,486.61/3,947.80
  6. Step 6: Final answer
    x = 3,130.98

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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.