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Finding the Fourth Proportional to 6,487.82, 8,953.37 and 3,969.88

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Solution

The fourth proportional to 6,487.82, 8,953.37 and 3,969.88 is: 5,478.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.82 : 8,953.37 = 3,969.88 : x
  2. Step 2: Convert to fraction form
    6,487.82/8,953.37 = 3,969.88/x
  3. Step 3: Cross multiply
    6,487.82x = 8,953.37 × 3,969.88
  4. Step 4: Simplify right side
    6,487.82x = 35,543,816.95
  5. Step 5: Solve for x
    x = 35,543,816.95/6,487.82
  6. Step 6: Final answer
    x = 5,478.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.