Home / 3,947.42-5,447.45-2,154.89

Finding the Fourth Proportional to 3,947.42, 5,447.45 and 2,154.89

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Solution

The fourth proportional to 3,947.42, 5,447.45 and 2,154.89 is: 2,973.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.42 : 5,447.45 = 2,154.89 : x
  2. Step 2: Convert to fraction form
    3,947.42/5,447.45 = 2,154.89/x
  3. Step 3: Cross multiply
    3,947.42x = 5,447.45 × 2,154.89
  4. Step 4: Simplify right side
    3,947.42x = 11,738,674.54
  5. Step 5: Solve for x
    x = 11,738,674.54/3,947.42
  6. Step 6: Final answer
    x = 2,973.76

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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.