Home / 13,916.76-20,869.66-5,145.66

Finding the Fourth Proportional to 13,916.76, 20,869.66 and 5,145.66

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Solution

The fourth proportional to 13,916.76, 20,869.66 and 5,145.66 is: 7,716.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,916.76 : 20,869.66 = 5,145.66 : x
  2. Step 2: Convert to fraction form
    13,916.76/20,869.66 = 5,145.66/x
  3. Step 3: Cross multiply
    13,916.76x = 20,869.66 × 5,145.66
  4. Step 4: Simplify right side
    13,916.76x = 107,388,174.68
  5. Step 5: Solve for x
    x = 107,388,174.68/13,916.76
  6. Step 6: Final answer
    x = 7,716.46

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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.