Home / 3,143.60-4,715.40-2,106.80

Finding the Fourth Proportional to 3,143.60, 4,715.40 and 2,106.80

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Solution

The fourth proportional to 3,143.60, 4,715.40 and 2,106.80 is: 3,160.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.60 : 4,715.40 = 2,106.80 : x
  2. Step 2: Convert to fraction form
    3,143.60/4,715.40 = 2,106.80/x
  3. Step 3: Cross multiply
    3,143.60x = 4,715.40 × 2,106.80
  4. Step 4: Simplify right side
    3,143.60x = 9,934,404.72
  5. Step 5: Solve for x
    x = 9,934,404.72/3,143.60
  6. Step 6: Final answer
    x = 3,160.20

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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.