Home / 20,138.16-27,789.76-11,186.28

Finding the Fourth Proportional to 20,138.16, 27,789.76 and 11,186.28

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Solution

The fourth proportional to 20,138.16, 27,789.76 and 11,186.28 is: 15,436.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.16 : 27,789.76 = 11,186.28 : x
  2. Step 2: Convert to fraction form
    20,138.16/27,789.76 = 11,186.28/x
  3. Step 3: Cross multiply
    20,138.16x = 27,789.76 × 11,186.28
  4. Step 4: Simplify right side
    20,138.16x = 310,864,036.49
  5. Step 5: Solve for x
    x = 310,864,036.49/20,138.16
  6. Step 6: Final answer
    x = 15,436.57

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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.