Home / 20,091.47-27,726.56-11,139.35

Finding the Fourth Proportional to 20,091.47, 27,726.56 and 11,139.35

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Solution

The fourth proportional to 20,091.47, 27,726.56 and 11,139.35 is: 15,372.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.47 : 27,726.56 = 11,139.35 : x
  2. Step 2: Convert to fraction form
    20,091.47/27,726.56 = 11,139.35/x
  3. Step 3: Cross multiply
    20,091.47x = 27,726.56 × 11,139.35
  4. Step 4: Simplify right side
    20,091.47x = 308,855,661.81
  5. Step 5: Solve for x
    x = 308,855,661.81/20,091.47
  6. Step 6: Final answer
    x = 15,372.48

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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.