Home / 27,707.31-38,186.64-20,976.81

Finding the Fourth Proportional to 27,707.31, 38,186.64 and 20,976.81

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Solution

The fourth proportional to 27,707.31, 38,186.64 and 20,976.81 is: 28,910.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,707.31 : 38,186.64 = 20,976.81 : x
  2. Step 2: Convert to fraction form
    27,707.31/38,186.64 = 20,976.81/x
  3. Step 3: Cross multiply
    27,707.31x = 38,186.64 × 20,976.81
  4. Step 4: Simplify right side
    27,707.31x = 801,033,891.82
  5. Step 5: Solve for x
    x = 801,033,891.82/27,707.31
  6. Step 6: Final answer
    x = 28,910.56

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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.