Home / 20,172.23-27,839.07-11,220.57

Finding the Fourth Proportional to 20,172.23, 27,839.07 and 11,220.57

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Solution

The fourth proportional to 20,172.23, 27,839.07 and 11,220.57 is: 15,485.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.23 : 27,839.07 = 11,220.57 : x
  2. Step 2: Convert to fraction form
    20,172.23/27,839.07 = 11,220.57/x
  3. Step 3: Cross multiply
    20,172.23x = 27,839.07 × 11,220.57
  4. Step 4: Simplify right side
    20,172.23x = 312,370,275.75
  5. Step 5: Solve for x
    x = 312,370,275.75/20,172.23
  6. Step 6: Final answer
    x = 15,485.16

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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.