Home / 20,139.56-27,791.40-11,186.54

Finding the Fourth Proportional to 20,139.56, 27,791.40 and 11,186.54

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Solution

The fourth proportional to 20,139.56, 27,791.40 and 11,186.54 is: 15,436.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.56 : 27,791.40 = 11,186.54 : x
  2. Step 2: Convert to fraction form
    20,139.56/27,791.40 = 11,186.54/x
  3. Step 3: Cross multiply
    20,139.56x = 27,791.40 × 11,186.54
  4. Step 4: Simplify right side
    20,139.56x = 310,889,607.76
  5. Step 5: Solve for x
    x = 310,889,607.76/20,139.56
  6. Step 6: Final answer
    x = 15,436.76

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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.