Home / 7,928.90-11,892.40-2,085.97

Finding the Fourth Proportional to 7,928.90, 11,892.40 and 2,085.97

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Solution

The fourth proportional to 7,928.90, 11,892.40 and 2,085.97 is: 3,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.90 : 11,892.40 = 2,085.97 : x
  2. Step 2: Convert to fraction form
    7,928.90/11,892.40 = 2,085.97/x
  3. Step 3: Cross multiply
    7,928.90x = 11,892.40 × 2,085.97
  4. Step 4: Simplify right side
    7,928.90x = 24,807,189.63
  5. Step 5: Solve for x
    x = 24,807,189.63/7,928.90
  6. Step 6: Final answer
    x = 3,128.71

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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.