Home / 3,929.79-5,420.27-2,668.65

Finding the Fourth Proportional to 3,929.79, 5,420.27 and 2,668.65

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Solution

The fourth proportional to 3,929.79, 5,420.27 and 2,668.65 is: 3,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.79 : 5,420.27 = 2,668.65 : x
  2. Step 2: Convert to fraction form
    3,929.79/5,420.27 = 2,668.65/x
  3. Step 3: Cross multiply
    3,929.79x = 5,420.27 × 2,668.65
  4. Step 4: Simplify right side
    3,929.79x = 14,464,803.54
  5. Step 5: Solve for x
    x = 14,464,803.54/3,929.79
  6. Step 6: Final answer
    x = 3,680.81

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.