Home / 20,139.03-27,791.08-11,187.10

Finding the Fourth Proportional to 20,139.03, 27,791.08 and 11,187.10

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Solution

The fourth proportional to 20,139.03, 27,791.08 and 11,187.10 is: 15,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.03 : 27,791.08 = 11,187.10 : x
  2. Step 2: Convert to fraction form
    20,139.03/27,791.08 = 11,187.10/x
  3. Step 3: Cross multiply
    20,139.03x = 27,791.08 × 11,187.10
  4. Step 4: Simplify right side
    20,139.03x = 310,901,591.07
  5. Step 5: Solve for x
    x = 310,901,591.07/20,139.03
  6. Step 6: Final answer
    x = 15,437.76

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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.