Home / 11,812.57-17,719.80-3,914.77

Finding the Fourth Proportional to 11,812.57, 17,719.80 and 3,914.77

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Solution

The fourth proportional to 11,812.57, 17,719.80 and 3,914.77 is: 5,872.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,812.57 : 17,719.80 = 3,914.77 : x
  2. Step 2: Convert to fraction form
    11,812.57/17,719.80 = 3,914.77/x
  3. Step 3: Cross multiply
    11,812.57x = 17,719.80 × 3,914.77
  4. Step 4: Simplify right side
    11,812.57x = 69,368,941.45
  5. Step 5: Solve for x
    x = 69,368,941.45/11,812.57
  6. Step 6: Final answer
    x = 5,872.47

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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.