Home / 13,857.56-20,788.37-5,091.79

Finding the Fourth Proportional to 13,857.56, 20,788.37 and 5,091.79

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Solution

The fourth proportional to 13,857.56, 20,788.37 and 5,091.79 is: 7,638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.56 : 20,788.37 = 5,091.79 : x
  2. Step 2: Convert to fraction form
    13,857.56/20,788.37 = 5,091.79/x
  3. Step 3: Cross multiply
    13,857.56x = 20,788.37 × 5,091.79
  4. Step 4: Simplify right side
    13,857.56x = 105,849,950.98
  5. Step 5: Solve for x
    x = 105,849,950.98/13,857.56
  6. Step 6: Final answer
    x = 7,638.43

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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.