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Finding the Fourth Proportional to 7,920.44, 11,879.74 and 2,077.50

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Solution

The fourth proportional to 7,920.44, 11,879.74 and 2,077.50 is: 3,116.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.44 : 11,879.74 = 2,077.50 : x
  2. Step 2: Convert to fraction form
    7,920.44/11,879.74 = 2,077.50/x
  3. Step 3: Cross multiply
    7,920.44x = 11,879.74 × 2,077.50
  4. Step 4: Simplify right side
    7,920.44x = 24,680,159.85
  5. Step 5: Solve for x
    x = 24,680,159.85/7,920.44
  6. Step 6: Final answer
    x = 3,116.01

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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.