Home / 3,122.70-4,689.45-2,031.90

Finding the Fourth Proportional to 3,122.70, 4,689.45 and 2,031.90

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Solution

The fourth proportional to 3,122.70, 4,689.45 and 2,031.90 is: 3,051.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.70 : 4,689.45 = 2,031.90 : x
  2. Step 2: Convert to fraction form
    3,122.70/4,689.45 = 2,031.90/x
  3. Step 3: Cross multiply
    3,122.70x = 4,689.45 × 2,031.90
  4. Step 4: Simplify right side
    3,122.70x = 9,528,493.46
  5. Step 5: Solve for x
    x = 9,528,493.46/3,122.70
  6. Step 6: Final answer
    x = 3,051.36

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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.