Home / 20,190.89-27,860.10-11,238.17

Finding the Fourth Proportional to 20,190.89, 27,860.10 and 11,238.17

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Solution

The fourth proportional to 20,190.89, 27,860.10 and 11,238.17 is: 15,506.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.89 : 27,860.10 = 11,238.17 : x
  2. Step 2: Convert to fraction form
    20,190.89/27,860.10 = 11,238.17/x
  3. Step 3: Cross multiply
    20,190.89x = 27,860.10 × 11,238.17
  4. Step 4: Simplify right side
    20,190.89x = 313,096,400.72
  5. Step 5: Solve for x
    x = 313,096,400.72/20,190.89
  6. Step 6: Final answer
    x = 15,506.82

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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.