Home / 7,920.69-11,880.11-2,077.76

Finding the Fourth Proportional to 7,920.69, 11,880.11 and 2,077.76

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Solution

The fourth proportional to 7,920.69, 11,880.11 and 2,077.76 is: 3,116.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.69 : 11,880.11 = 2,077.76 : x
  2. Step 2: Convert to fraction form
    7,920.69/11,880.11 = 2,077.76/x
  3. Step 3: Cross multiply
    7,920.69x = 11,880.11 × 2,077.76
  4. Step 4: Simplify right side
    7,920.69x = 24,683,947.56
  5. Step 5: Solve for x
    x = 24,683,947.56/7,920.69
  6. Step 6: Final answer
    x = 3,116.39

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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.