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Finding the Fourth Proportional to 3,726.71, 5,143.49 and 2,155.71

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Solution

The fourth proportional to 3,726.71, 5,143.49 and 2,155.71 is: 2,975.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,726.71 : 5,143.49 = 2,155.71 : x
  2. Step 2: Convert to fraction form
    3,726.71/5,143.49 = 2,155.71/x
  3. Step 3: Cross multiply
    3,726.71x = 5,143.49 × 2,155.71
  4. Step 4: Simplify right side
    3,726.71x = 11,087,862.05
  5. Step 5: Solve for x
    x = 11,087,862.05/3,726.71
  6. Step 6: Final answer
    x = 2,975.25

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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.