Home / 3,865.80-5,335.38-3,275.40

Finding the Fourth Proportional to 3,865.80, 5,335.38 and 3,275.40

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Solution

The fourth proportional to 3,865.80, 5,335.38 and 3,275.40 is: 4,520.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.80 : 5,335.38 = 3,275.40 : x
  2. Step 2: Convert to fraction form
    3,865.80/5,335.38 = 3,275.40/x
  3. Step 3: Cross multiply
    3,865.80x = 5,335.38 × 3,275.40
  4. Step 4: Simplify right side
    3,865.80x = 17,475,503.65
  5. Step 5: Solve for x
    x = 17,475,503.65/3,865.80
  6. Step 6: Final answer
    x = 4,520.54

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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.