Home / 20,138.88-27,790.53-11,186.16

Finding the Fourth Proportional to 20,138.88, 27,790.53 and 11,186.16

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Solution

The fourth proportional to 20,138.88, 27,790.53 and 11,186.16 is: 15,436.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.88 : 27,790.53 = 11,186.16 : x
  2. Step 2: Convert to fraction form
    20,138.88/27,790.53 = 11,186.16/x
  3. Step 3: Cross multiply
    20,138.88x = 27,790.53 × 11,186.16
  4. Step 4: Simplify right side
    20,138.88x = 310,869,315.06
  5. Step 5: Solve for x
    x = 310,869,315.06/20,138.88
  6. Step 6: Final answer
    x = 15,436.28

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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.