Home / 20,139.16-27,791.14-11,187.28

Finding the Fourth Proportional to 20,139.16, 27,791.14 and 11,187.28

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Solution

The fourth proportional to 20,139.16, 27,791.14 and 11,187.28 is: 15,437.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.16 : 27,791.14 = 11,187.28 : x
  2. Step 2: Convert to fraction form
    20,139.16/27,791.14 = 11,187.28/x
  3. Step 3: Cross multiply
    20,139.16x = 27,791.14 × 11,187.28
  4. Step 4: Simplify right side
    20,139.16x = 310,907,264.70
  5. Step 5: Solve for x
    x = 310,907,264.70/20,139.16
  6. Step 6: Final answer
    x = 15,437.95

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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.