Home / 3,143.80-4,337.10-1,965.40

Finding the Fourth Proportional to 3,143.80, 4,337.10 and 1,965.40

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Solution

The fourth proportional to 3,143.80, 4,337.10 and 1,965.40 is: 2,711.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.80 : 4,337.10 = 1,965.40 : x
  2. Step 2: Convert to fraction form
    3,143.80/4,337.10 = 1,965.40/x
  3. Step 3: Cross multiply
    3,143.80x = 4,337.10 × 1,965.40
  4. Step 4: Simplify right side
    3,143.80x = 8,524,136.34
  5. Step 5: Solve for x
    x = 8,524,136.34/3,143.80
  6. Step 6: Final answer
    x = 2,711.41

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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.