Home / 3,929.46-5,420.40-2,356.62

Finding the Fourth Proportional to 3,929.46, 5,420.40 and 2,356.62

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Solution

The fourth proportional to 3,929.46, 5,420.40 and 2,356.62 is: 3,250.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.46 : 5,420.40 = 2,356.62 : x
  2. Step 2: Convert to fraction form
    3,929.46/5,420.40 = 2,356.62/x
  3. Step 3: Cross multiply
    3,929.46x = 5,420.40 × 2,356.62
  4. Step 4: Simplify right side
    3,929.46x = 12,773,823.05
  5. Step 5: Solve for x
    x = 12,773,823.05/3,929.46
  6. Step 6: Final answer
    x = 3,250.78

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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.