Home / 5,436.40-8,149.20-2,660.80

Finding the Fourth Proportional to 5,436.40, 8,149.20 and 2,660.80

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Solution

The fourth proportional to 5,436.40, 8,149.20 and 2,660.80 is: 3,988.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,436.40 : 8,149.20 = 2,660.80 : x
  2. Step 2: Convert to fraction form
    5,436.40/8,149.20 = 2,660.80/x
  3. Step 3: Cross multiply
    5,436.40x = 8,149.20 × 2,660.80
  4. Step 4: Simplify right side
    5,436.40x = 21,683,391.36
  5. Step 5: Solve for x
    x = 21,683,391.36/5,436.40
  6. Step 6: Final answer
    x = 3,988.56

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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.