Home / 7,781.58-11,664.77-3,100.19

Finding the Fourth Proportional to 7,781.58, 11,664.77 and 3,100.19

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Solution

The fourth proportional to 7,781.58, 11,664.77 and 3,100.19 is: 4,647.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.58 : 11,664.77 = 3,100.19 : x
  2. Step 2: Convert to fraction form
    7,781.58/11,664.77 = 3,100.19/x
  3. Step 3: Cross multiply
    7,781.58x = 11,664.77 × 3,100.19
  4. Step 4: Simplify right side
    7,781.58x = 36,162,929.48
  5. Step 5: Solve for x
    x = 36,162,929.48/7,781.58
  6. Step 6: Final answer
    x = 4,647.25

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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.