Home / 11,875.14-17,812.19-3,109.86

Finding the Fourth Proportional to 11,875.14, 17,812.19 and 3,109.86

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Solution

The fourth proportional to 11,875.14, 17,812.19 and 3,109.86 is: 4,664.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,875.14 : 17,812.19 = 3,109.86 : x
  2. Step 2: Convert to fraction form
    11,875.14/17,812.19 = 3,109.86/x
  3. Step 3: Cross multiply
    11,875.14x = 17,812.19 × 3,109.86
  4. Step 4: Simplify right side
    11,875.14x = 55,393,401.64
  5. Step 5: Solve for x
    x = 55,393,401.64/11,875.14
  6. Step 6: Final answer
    x = 4,664.65

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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.