Home / 3,145.96-4,351.62-2,947.72

Finding the Fourth Proportional to 3,145.96, 4,351.62 and 2,947.72

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Solution

The fourth proportional to 3,145.96, 4,351.62 and 2,947.72 is: 4,077.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.96 : 4,351.62 = 2,947.72 : x
  2. Step 2: Convert to fraction form
    3,145.96/4,351.62 = 2,947.72/x
  3. Step 3: Cross multiply
    3,145.96x = 4,351.62 × 2,947.72
  4. Step 4: Simplify right side
    3,145.96x = 12,827,357.31
  5. Step 5: Solve for x
    x = 12,827,357.31/3,145.96
  6. Step 6: Final answer
    x = 4,077.41

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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.