Home / 7,912.16-11,858.75-3,689.72

Finding the Fourth Proportional to 7,912.16, 11,858.75 and 3,689.72

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Solution

The fourth proportional to 7,912.16, 11,858.75 and 3,689.72 is: 5,530.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.16 : 11,858.75 = 3,689.72 : x
  2. Step 2: Convert to fraction form
    7,912.16/11,858.75 = 3,689.72/x
  3. Step 3: Cross multiply
    7,912.16x = 11,858.75 × 3,689.72
  4. Step 4: Simplify right side
    7,912.16x = 43,755,448.60
  5. Step 5: Solve for x
    x = 43,755,448.60/7,912.16
  6. Step 6: Final answer
    x = 5,530.15

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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.