Home / 10,120.19-15,169.89-3,878.51

Finding the Fourth Proportional to 10,120.19, 15,169.89 and 3,878.51

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Solution

The fourth proportional to 10,120.19, 15,169.89 and 3,878.51 is: 5,813.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.19 : 15,169.89 = 3,878.51 : x
  2. Step 2: Convert to fraction form
    10,120.19/15,169.89 = 3,878.51/x
  3. Step 3: Cross multiply
    10,120.19x = 15,169.89 × 3,878.51
  4. Step 4: Simplify right side
    10,120.19x = 58,836,570.06
  5. Step 5: Solve for x
    x = 58,836,570.06/10,120.19
  6. Step 6: Final answer
    x = 5,813.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.