Home / 3,726.81-5,143.10-2,155.01

Finding the Fourth Proportional to 3,726.81, 5,143.10 and 2,155.01

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Solution

The fourth proportional to 3,726.81, 5,143.10 and 2,155.01 is: 2,973.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,726.81 : 5,143.10 = 2,155.01 : x
  2. Step 2: Convert to fraction form
    3,726.81/5,143.10 = 2,155.01/x
  3. Step 3: Cross multiply
    3,726.81x = 5,143.10 × 2,155.01
  4. Step 4: Simplify right side
    3,726.81x = 11,083,395.44
  5. Step 5: Solve for x
    x = 11,083,395.44/3,726.81
  6. Step 6: Final answer
    x = 2,973.96

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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.