Home / 5,178.80-7,146.83-2,940.71

Finding the Fourth Proportional to 5,178.80, 7,146.83 and 2,940.71

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Solution

The fourth proportional to 5,178.80, 7,146.83 and 2,940.71 is: 4,058.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.80 : 7,146.83 = 2,940.71 : x
  2. Step 2: Convert to fraction form
    5,178.80/7,146.83 = 2,940.71/x
  3. Step 3: Cross multiply
    5,178.80x = 7,146.83 × 2,940.71
  4. Step 4: Simplify right side
    5,178.80x = 21,016,726.07
  5. Step 5: Solve for x
    x = 21,016,726.07/5,178.80
  6. Step 6: Final answer
    x = 4,058.22

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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.