Home / 8,422.97-12,628.40-3,978.17

Finding the Fourth Proportional to 8,422.97, 12,628.40 and 3,978.17

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Solution

The fourth proportional to 8,422.97, 12,628.40 and 3,978.17 is: 5,964.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.97 : 12,628.40 = 3,978.17 : x
  2. Step 2: Convert to fraction form
    8,422.97/12,628.40 = 3,978.17/x
  3. Step 3: Cross multiply
    8,422.97x = 12,628.40 × 3,978.17
  4. Step 4: Simplify right side
    8,422.97x = 50,237,902.14
  5. Step 5: Solve for x
    x = 50,237,902.14/8,422.97
  6. Step 6: Final answer
    x = 5,964.39

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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.