Home / 20,209.79-27,888.59-11,257.22

Finding the Fourth Proportional to 20,209.79, 27,888.59 and 11,257.22

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Solution

The fourth proportional to 20,209.79, 27,888.59 and 11,257.22 is: 15,534.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.79 : 27,888.59 = 11,257.22 : x
  2. Step 2: Convert to fraction form
    20,209.79/27,888.59 = 11,257.22/x
  3. Step 3: Cross multiply
    20,209.79x = 27,888.59 × 11,257.22
  4. Step 4: Simplify right side
    20,209.79x = 313,947,993.12
  5. Step 5: Solve for x
    x = 313,947,993.12/20,209.79
  6. Step 6: Final answer
    x = 15,534.45

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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.