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Finding the Fourth Proportional to 6,640.80, 9,959.27 and 1,959.93

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Solution

The fourth proportional to 6,640.80, 9,959.27 and 1,959.93 is: 2,939.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.80 : 9,959.27 = 1,959.93 : x
  2. Step 2: Convert to fraction form
    6,640.80/9,959.27 = 1,959.93/x
  3. Step 3: Cross multiply
    6,640.80x = 9,959.27 × 1,959.93
  4. Step 4: Simplify right side
    6,640.80x = 19,519,472.05
  5. Step 5: Solve for x
    x = 19,519,472.05/6,640.80
  6. Step 6: Final answer
    x = 2,939.33

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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.