Home / 20,091.81-27,726.57-11,139.32

Finding the Fourth Proportional to 20,091.81, 27,726.57 and 11,139.32

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Solution

The fourth proportional to 20,091.81, 27,726.57 and 11,139.32 is: 15,372.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.81 : 27,726.57 = 11,139.32 : x
  2. Step 2: Convert to fraction form
    20,091.81/27,726.57 = 11,139.32/x
  3. Step 3: Cross multiply
    20,091.81x = 27,726.57 × 11,139.32
  4. Step 4: Simplify right side
    20,091.81x = 308,854,997.10
  5. Step 5: Solve for x
    x = 308,854,997.10/20,091.81
  6. Step 6: Final answer
    x = 15,372.18

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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.