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Finding the Fourth Proportional to 6,875.97, 9,489.09 and 3,891.63

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Solution

The fourth proportional to 6,875.97, 9,489.09 and 3,891.63 is: 5,370.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,875.97 : 9,489.09 = 3,891.63 : x
  2. Step 2: Convert to fraction form
    6,875.97/9,489.09 = 3,891.63/x
  3. Step 3: Cross multiply
    6,875.97x = 9,489.09 × 3,891.63
  4. Step 4: Simplify right side
    6,875.97x = 36,928,027.32
  5. Step 5: Solve for x
    x = 36,928,027.32/6,875.97
  6. Step 6: Final answer
    x = 5,370.59

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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.