Home / 18,831.84-28,218.56-11,891.76

Finding the Fourth Proportional to 18,831.84, 28,218.56 and 11,891.76

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Solution

The fourth proportional to 18,831.84, 28,218.56 and 11,891.76 is: 17,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.84 : 28,218.56 = 11,891.76 : x
  2. Step 2: Convert to fraction form
    18,831.84/28,218.56 = 11,891.76/x
  3. Step 3: Cross multiply
    18,831.84x = 28,218.56 × 11,891.76
  4. Step 4: Simplify right side
    18,831.84x = 335,568,343.07
  5. Step 5: Solve for x
    x = 335,568,343.07/18,831.84
  6. Step 6: Final answer
    x = 17,819.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.