Home / 11,880.91-17,815.86-6,686.78

Finding the Fourth Proportional to 11,880.91, 17,815.86 and 6,686.78

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Solution

The fourth proportional to 11,880.91, 17,815.86 and 6,686.78 is: 10,027.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,880.91 : 17,815.86 = 6,686.78 : x
  2. Step 2: Convert to fraction form
    11,880.91/17,815.86 = 6,686.78/x
  3. Step 3: Cross multiply
    11,880.91x = 17,815.86 × 6,686.78
  4. Step 4: Simplify right side
    11,880.91x = 119,130,736.33
  5. Step 5: Solve for x
    x = 119,130,736.33/11,880.91
  6. Step 6: Final answer
    x = 10,027.07

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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.