Home / 11,870.91-17,807.57-3,105.90

Finding the Fourth Proportional to 11,870.91, 17,807.57 and 3,105.90

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Solution

The fourth proportional to 11,870.91, 17,807.57 and 3,105.90 is: 4,659.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,870.91 : 17,807.57 = 3,105.90 : x
  2. Step 2: Convert to fraction form
    11,870.91/17,807.57 = 3,105.90/x
  3. Step 3: Cross multiply
    11,870.91x = 17,807.57 × 3,105.90
  4. Step 4: Simplify right side
    11,870.91x = 55,308,531.66
  5. Step 5: Solve for x
    x = 55,308,531.66/11,870.91
  6. Step 6: Final answer
    x = 4,659.17

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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.