Home / 7,928.40-11,891.66-2,085.47

Finding the Fourth Proportional to 7,928.40, 11,891.66 and 2,085.47

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Solution

The fourth proportional to 7,928.40, 11,891.66 and 2,085.47 is: 3,127.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.40 : 11,891.66 = 2,085.47 : x
  2. Step 2: Convert to fraction form
    7,928.40/11,891.66 = 2,085.47/x
  3. Step 3: Cross multiply
    7,928.40x = 11,891.66 × 2,085.47
  4. Step 4: Simplify right side
    7,928.40x = 24,799,700.18
  5. Step 5: Solve for x
    x = 24,799,700.18/7,928.40
  6. Step 6: Final answer
    x = 3,127.96

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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.