Home / 20,209.56-27,888.81-11,257.80

Finding the Fourth Proportional to 20,209.56, 27,888.81 and 11,257.80

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Solution

The fourth proportional to 20,209.56, 27,888.81 and 11,257.80 is: 15,535.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.56 : 27,888.81 = 11,257.80 : x
  2. Step 2: Convert to fraction form
    20,209.56/27,888.81 = 11,257.80/x
  3. Step 3: Cross multiply
    20,209.56x = 27,888.81 × 11,257.80
  4. Step 4: Simplify right side
    20,209.56x = 313,966,645.22
  5. Step 5: Solve for x
    x = 313,966,645.22/20,209.56
  6. Step 6: Final answer
    x = 15,535.55

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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.