Home / 20,188.71-27,860.21-11,236.07

Finding the Fourth Proportional to 20,188.71, 27,860.21 and 11,236.07

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Solution

The fourth proportional to 20,188.71, 27,860.21 and 11,236.07 is: 15,505.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.71 : 27,860.21 = 11,236.07 : x
  2. Step 2: Convert to fraction form
    20,188.71/27,860.21 = 11,236.07/x
  3. Step 3: Cross multiply
    20,188.71x = 27,860.21 × 11,236.07
  4. Step 4: Simplify right side
    20,188.71x = 313,039,074.29
  5. Step 5: Solve for x
    x = 313,039,074.29/20,188.71
  6. Step 6: Final answer
    x = 15,505.65

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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.