Home / 3,423.45-5,129.10-2,123.40

Finding the Fourth Proportional to 3,423.45, 5,129.10 and 2,123.40

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Solution

The fourth proportional to 3,423.45, 5,129.10 and 2,123.40 is: 3,181.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.45 : 5,129.10 = 2,123.40 : x
  2. Step 2: Convert to fraction form
    3,423.45/5,129.10 = 2,123.40/x
  3. Step 3: Cross multiply
    3,423.45x = 5,129.10 × 2,123.40
  4. Step 4: Simplify right side
    3,423.45x = 10,891,130.94
  5. Step 5: Solve for x
    x = 10,891,130.94/3,423.45
  6. Step 6: Final answer
    x = 3,181.33

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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.