Home / 2,138.12-2,947.38-1,671.56

Finding the Fourth Proportional to 2,138.12, 2,947.38 and 1,671.56

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Solution

The fourth proportional to 2,138.12, 2,947.38 and 1,671.56 is: 2,304.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.12 : 2,947.38 = 1,671.56 : x
  2. Step 2: Convert to fraction form
    2,138.12/2,947.38 = 1,671.56/x
  3. Step 3: Cross multiply
    2,138.12x = 2,947.38 × 1,671.56
  4. Step 4: Simplify right side
    2,138.12x = 4,926,722.51
  5. Step 5: Solve for x
    x = 4,926,722.51/2,138.12
  6. Step 6: Final answer
    x = 2,304.23

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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.