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Finding the Fourth Proportional to 6,641.87, 9,959.33 and 1,961.28

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Solution

The fourth proportional to 6,641.87, 9,959.33 and 1,961.28 is: 2,940.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.87 : 9,959.33 = 1,961.28 : x
  2. Step 2: Convert to fraction form
    6,641.87/9,959.33 = 1,961.28/x
  3. Step 3: Cross multiply
    6,641.87x = 9,959.33 × 1,961.28
  4. Step 4: Simplify right side
    6,641.87x = 19,533,039.65
  5. Step 5: Solve for x
    x = 19,533,039.65/6,641.87
  6. Step 6: Final answer
    x = 2,940.90

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1.5x scale

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.