Home / 20,139.80-27,794.14-11,187.36

Finding the Fourth Proportional to 20,139.80, 27,794.14 and 11,187.36

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Solution

The fourth proportional to 20,139.80, 27,794.14 and 11,187.36 is: 15,439.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.80 : 27,794.14 = 11,187.36 : x
  2. Step 2: Convert to fraction form
    20,139.80/27,794.14 = 11,187.36/x
  3. Step 3: Cross multiply
    20,139.80x = 27,794.14 × 11,187.36
  4. Step 4: Simplify right side
    20,139.80x = 310,943,050.07
  5. Step 5: Solve for x
    x = 310,943,050.07/20,139.80
  6. Step 6: Final answer
    x = 15,439.23

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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.