Home / 2,652.91-3,981.26-2,139.12

Finding the Fourth Proportional to 2,652.91, 3,981.26 and 2,139.12

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Solution

The fourth proportional to 2,652.91, 3,981.26 and 2,139.12 is: 3,210.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,652.91 : 3,981.26 = 2,139.12 : x
  2. Step 2: Convert to fraction form
    2,652.91/3,981.26 = 2,139.12/x
  3. Step 3: Cross multiply
    2,652.91x = 3,981.26 × 2,139.12
  4. Step 4: Simplify right side
    2,652.91x = 8,516,398.24
  5. Step 5: Solve for x
    x = 8,516,398.24/2,652.91
  6. Step 6: Final answer
    x = 3,210.21

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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.