Home / 20,071.16-27,698.39-11,118.78

Finding the Fourth Proportional to 20,071.16, 27,698.39 and 11,118.78

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Solution

The fourth proportional to 20,071.16, 27,698.39 and 11,118.78 is: 15,344.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,071.16 : 27,698.39 = 11,118.78 : x
  2. Step 2: Convert to fraction form
    20,071.16/27,698.39 = 11,118.78/x
  3. Step 3: Cross multiply
    20,071.16x = 27,698.39 × 11,118.78
  4. Step 4: Simplify right side
    20,071.16x = 307,972,290.87
  5. Step 5: Solve for x
    x = 307,972,290.87/20,071.16
  6. Step 6: Final answer
    x = 15,344.02

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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.