Home / 3,929.13-5,417.97-2,809.65

Finding the Fourth Proportional to 3,929.13, 5,417.97 and 2,809.65

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Solution

The fourth proportional to 3,929.13, 5,417.97 and 2,809.65 is: 3,874.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.13 : 5,417.97 = 2,809.65 : x
  2. Step 2: Convert to fraction form
    3,929.13/5,417.97 = 2,809.65/x
  3. Step 3: Cross multiply
    3,929.13x = 5,417.97 × 2,809.65
  4. Step 4: Simplify right side
    3,929.13x = 15,222,599.41
  5. Step 5: Solve for x
    x = 15,222,599.41/3,929.13
  6. Step 6: Final answer
    x = 3,874.29

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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.