Home / 3,128.28-4,318.74-2,135.04

Finding the Fourth Proportional to 3,128.28, 4,318.74 and 2,135.04

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Solution

The fourth proportional to 3,128.28, 4,318.74 and 2,135.04 is: 2,947.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.28 : 4,318.74 = 2,135.04 : x
  2. Step 2: Convert to fraction form
    3,128.28/4,318.74 = 2,135.04/x
  3. Step 3: Cross multiply
    3,128.28x = 4,318.74 × 2,135.04
  4. Step 4: Simplify right side
    3,128.28x = 9,220,682.65
  5. Step 5: Solve for x
    x = 9,220,682.65/3,128.28
  6. Step 6: Final answer
    x = 2,947.52

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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.