Home / 20,087.40-27,722.25-11,137.71

Finding the Fourth Proportional to 20,087.40, 27,722.25 and 11,137.71

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Solution

The fourth proportional to 20,087.40, 27,722.25 and 11,137.71 is: 15,370.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.40 : 27,722.25 = 11,137.71 : x
  2. Step 2: Convert to fraction form
    20,087.40/27,722.25 = 11,137.71/x
  3. Step 3: Cross multiply
    20,087.40x = 27,722.25 × 11,137.71
  4. Step 4: Simplify right side
    20,087.40x = 308,762,381.05
  5. Step 5: Solve for x
    x = 308,762,381.05/20,087.40
  6. Step 6: Final answer
    x = 15,370.95

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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.