Home / 20,139.89-27,791.53-11,186.64

Finding the Fourth Proportional to 20,139.89, 27,791.53 and 11,186.64

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Solution

The fourth proportional to 20,139.89, 27,791.53 and 11,186.64 is: 15,436.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.89 : 27,791.53 = 11,186.64 : x
  2. Step 2: Convert to fraction form
    20,139.89/27,791.53 = 11,186.64/x
  3. Step 3: Cross multiply
    20,139.89x = 27,791.53 × 11,186.64
  4. Step 4: Simplify right side
    20,139.89x = 310,893,813.19
  5. Step 5: Solve for x
    x = 310,893,813.19/20,139.89
  6. Step 6: Final answer
    x = 15,436.72

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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.