Home / 3,929.08-5,422.17-2,160.65

Finding the Fourth Proportional to 3,929.08, 5,422.17 and 2,160.65

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Solution

The fourth proportional to 3,929.08, 5,422.17 and 2,160.65 is: 2,981.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.08 : 5,422.17 = 2,160.65 : x
  2. Step 2: Convert to fraction form
    3,929.08/5,422.17 = 2,160.65/x
  3. Step 3: Cross multiply
    3,929.08x = 5,422.17 × 2,160.65
  4. Step 4: Simplify right side
    3,929.08x = 11,715,411.61
  5. Step 5: Solve for x
    x = 11,715,411.61/3,929.08
  6. Step 6: Final answer
    x = 2,981.72

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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.