Home / 7,928.60-11,892.87-2,085.21

Finding the Fourth Proportional to 7,928.60, 11,892.87 and 2,085.21

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Solution

The fourth proportional to 7,928.60, 11,892.87 and 2,085.21 is: 3,127.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.60 : 11,892.87 = 2,085.21 : x
  2. Step 2: Convert to fraction form
    7,928.60/11,892.87 = 2,085.21/x
  3. Step 3: Cross multiply
    7,928.60x = 11,892.87 × 2,085.21
  4. Step 4: Simplify right side
    7,928.60x = 24,799,131.45
  5. Step 5: Solve for x
    x = 24,799,131.45/7,928.60
  6. Step 6: Final answer
    x = 3,127.81

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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.