Home / 3,722.90-5,137.29-2,129.49

Finding the Fourth Proportional to 3,722.90, 5,137.29 and 2,129.49

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Solution

The fourth proportional to 3,722.90, 5,137.29 and 2,129.49 is: 2,938.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,722.90 : 5,137.29 = 2,129.49 : x
  2. Step 2: Convert to fraction form
    3,722.90/5,137.29 = 2,129.49/x
  3. Step 3: Cross multiply
    3,722.90x = 5,137.29 × 2,129.49
  4. Step 4: Simplify right side
    3,722.90x = 10,939,807.68
  5. Step 5: Solve for x
    x = 10,939,807.68/3,722.90
  6. Step 6: Final answer
    x = 2,938.52

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1.5x scale

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.