Home / 3,909.15-5,863.79-1,312.11

Finding the Fourth Proportional to 3,909.15, 5,863.79 and 1,312.11

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Solution

The fourth proportional to 3,909.15, 5,863.79 and 1,312.11 is: 1,968.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.15 : 5,863.79 = 1,312.11 : x
  2. Step 2: Convert to fraction form
    3,909.15/5,863.79 = 1,312.11/x
  3. Step 3: Cross multiply
    3,909.15x = 5,863.79 × 1,312.11
  4. Step 4: Simplify right side
    3,909.15x = 7,693,930.94
  5. Step 5: Solve for x
    x = 7,693,930.94/3,909.15
  6. Step 6: Final answer
    x = 1,968.19

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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.