Home / 15,422.40-21,282.82-8,708

Finding the Fourth Proportional to 15,422.40, 21,282.82 and 8,708

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Solution

The fourth proportional to 15,422.40, 21,282.82 and 8,708 is: 12,016.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,422.40 : 21,282.82 = 8,708 : x
  2. Step 2: Convert to fraction form
    15,422.40/21,282.82 = 8,708/x
  3. Step 3: Cross multiply
    15,422.40x = 21,282.82 × 8,708
  4. Step 4: Simplify right side
    15,422.40x = 185,330,796.56
  5. Step 5: Solve for x
    x = 185,330,796.56/15,422.40
  6. Step 6: Final answer
    x = 12,016.99

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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.