Home / 3,929.76-5,420.69-2,335.85

Finding the Fourth Proportional to 3,929.76, 5,420.69 and 2,335.85

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Solution

The fourth proportional to 3,929.76, 5,420.69 and 2,335.85 is: 3,222.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.76 : 5,420.69 = 2,335.85 : x
  2. Step 2: Convert to fraction form
    3,929.76/5,420.69 = 2,335.85/x
  3. Step 3: Cross multiply
    3,929.76x = 5,420.69 × 2,335.85
  4. Step 4: Simplify right side
    3,929.76x = 12,661,909.04
  5. Step 5: Solve for x
    x = 12,661,909.04/3,929.76
  6. Step 6: Final answer
    x = 3,222.06

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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.