Home / 3,710.90-5,121.29-2,139.10

Finding the Fourth Proportional to 3,710.90, 5,121.29 and 2,139.10

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Solution

The fourth proportional to 3,710.90, 5,121.29 and 2,139.10 is: 2,952.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,710.90 : 5,121.29 = 2,139.10 : x
  2. Step 2: Convert to fraction form
    3,710.90/5,121.29 = 2,139.10/x
  3. Step 3: Cross multiply
    3,710.90x = 5,121.29 × 2,139.10
  4. Step 4: Simplify right side
    3,710.90x = 10,954,943.98
  5. Step 5: Solve for x
    x = 10,954,943.98/3,710.90
  6. Step 6: Final answer
    x = 2,952.10

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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.