Home / 3,421.10-5,131.65-2,125.10

Finding the Fourth Proportional to 3,421.10, 5,131.65 and 2,125.10

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Solution

The fourth proportional to 3,421.10, 5,131.65 and 2,125.10 is: 3,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.10 : 5,131.65 = 2,125.10 : x
  2. Step 2: Convert to fraction form
    3,421.10/5,131.65 = 2,125.10/x
  3. Step 3: Cross multiply
    3,421.10x = 5,131.65 × 2,125.10
  4. Step 4: Simplify right side
    3,421.10x = 10,905,269.42
  5. Step 5: Solve for x
    x = 10,905,269.42/3,421.10
  6. Step 6: Final answer
    x = 3,187.65

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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.