Home / 13,780.01-20,669.29-3,917.99

Finding the Fourth Proportional to 13,780.01, 20,669.29 and 3,917.99

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Solution

The fourth proportional to 13,780.01, 20,669.29 and 3,917.99 is: 5,876.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.01 : 20,669.29 = 3,917.99 : x
  2. Step 2: Convert to fraction form
    13,780.01/20,669.29 = 3,917.99/x
  3. Step 3: Cross multiply
    13,780.01x = 20,669.29 × 3,917.99
  4. Step 4: Simplify right side
    13,780.01x = 80,982,071.53
  5. Step 5: Solve for x
    x = 80,982,071.53/13,780.01
  6. Step 6: Final answer
    x = 5,876.78

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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.