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Finding the Fourth Proportional to 6,891.55, 10,335.76 and 1,961.08

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Solution

The fourth proportional to 6,891.55, 10,335.76 and 1,961.08 is: 2,941.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.55 : 10,335.76 = 1,961.08 : x
  2. Step 2: Convert to fraction form
    6,891.55/10,335.76 = 1,961.08/x
  3. Step 3: Cross multiply
    6,891.55x = 10,335.76 × 1,961.08
  4. Step 4: Simplify right side
    6,891.55x = 20,269,221.48
  5. Step 5: Solve for x
    x = 20,269,221.48/6,891.55
  6. Step 6: Final answer
    x = 2,941.17

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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.