Home / 7,916.80-11,872.40-2,721.48

Finding the Fourth Proportional to 7,916.80, 11,872.40 and 2,721.48

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Solution

The fourth proportional to 7,916.80, 11,872.40 and 2,721.48 is: 4,081.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916.80 : 11,872.40 = 2,721.48 : x
  2. Step 2: Convert to fraction form
    7,916.80/11,872.40 = 2,721.48/x
  3. Step 3: Cross multiply
    7,916.80x = 11,872.40 × 2,721.48
  4. Step 4: Simplify right side
    7,916.80x = 32,310,499.15
  5. Step 5: Solve for x
    x = 32,310,499.15/7,916.80
  6. Step 6: Final answer
    x = 4,081.26

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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.