Home / 3,247.40-4,871.10-2,145.80

Finding the Fourth Proportional to 3,247.40, 4,871.10 and 2,145.80

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Solution

The fourth proportional to 3,247.40, 4,871.10 and 2,145.80 is: 3,218.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,247.40 : 4,871.10 = 2,145.80 : x
  2. Step 2: Convert to fraction form
    3,247.40/4,871.10 = 2,145.80/x
  3. Step 3: Cross multiply
    3,247.40x = 4,871.10 × 2,145.80
  4. Step 4: Simplify right side
    3,247.40x = 10,452,406.38
  5. Step 5: Solve for x
    x = 10,452,406.38/3,247.40
  6. Step 6: Final answer
    x = 3,218.70

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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.