Home / 5,257.80-7,886.70-2,660.40

Finding the Fourth Proportional to 5,257.80, 7,886.70 and 2,660.40

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Solution

The fourth proportional to 5,257.80, 7,886.70 and 2,660.40 is: 3,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,257.80 : 7,886.70 = 2,660.40 : x
  2. Step 2: Convert to fraction form
    5,257.80/7,886.70 = 2,660.40/x
  3. Step 3: Cross multiply
    5,257.80x = 7,886.70 × 2,660.40
  4. Step 4: Simplify right side
    5,257.80x = 20,981,776.68
  5. Step 5: Solve for x
    x = 20,981,776.68/5,257.80
  6. Step 6: Final answer
    x = 3,990.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.