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Finding the Fourth Proportional to 6,641.70, 9,963.86 and 1,961.79

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Solution

The fourth proportional to 6,641.70, 9,963.86 and 1,961.79 is: 2,943.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.70 : 9,963.86 = 1,961.79 : x
  2. Step 2: Convert to fraction form
    6,641.70/9,963.86 = 1,961.79/x
  3. Step 3: Cross multiply
    6,641.70x = 9,963.86 × 1,961.79
  4. Step 4: Simplify right side
    6,641.70x = 19,547,000.91
  5. Step 5: Solve for x
    x = 19,547,000.91/6,641.70
  6. Step 6: Final answer
    x = 2,943.07

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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.