Home / 20,087.81-27,722.50-11,135.69

Finding the Fourth Proportional to 20,087.81, 27,722.50 and 11,135.69

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Solution

The fourth proportional to 20,087.81, 27,722.50 and 11,135.69 is: 15,367.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.81 : 27,722.50 = 11,135.69 : x
  2. Step 2: Convert to fraction form
    20,087.81/27,722.50 = 11,135.69/x
  3. Step 3: Cross multiply
    20,087.81x = 27,722.50 × 11,135.69
  4. Step 4: Simplify right side
    20,087.81x = 308,709,027.41
  5. Step 5: Solve for x
    x = 308,709,027.41/20,087.81
  6. Step 6: Final answer
    x = 15,367.98

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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.