Home / 3,929.03-5,422.08-2,160.77

Finding the Fourth Proportional to 3,929.03, 5,422.08 and 2,160.77

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Solution

The fourth proportional to 3,929.03, 5,422.08 and 2,160.77 is: 2,981.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.03 : 5,422.08 = 2,160.77 : x
  2. Step 2: Convert to fraction form
    3,929.03/5,422.08 = 2,160.77/x
  3. Step 3: Cross multiply
    3,929.03x = 5,422.08 × 2,160.77
  4. Step 4: Simplify right side
    3,929.03x = 11,715,854.25
  5. Step 5: Solve for x
    x = 11,715,854.25/3,929.03
  6. Step 6: Final answer
    x = 2,981.87

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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.