Home / 21,982.72-30,335.08-12,422.80

Finding the Fourth Proportional to 21,982.72, 30,335.08 and 12,422.80

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Solution

The fourth proportional to 21,982.72, 30,335.08 and 12,422.80 is: 17,142.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.72 : 30,335.08 = 12,422.80 : x
  2. Step 2: Convert to fraction form
    21,982.72/30,335.08 = 12,422.80/x
  3. Step 3: Cross multiply
    21,982.72x = 30,335.08 × 12,422.80
  4. Step 4: Simplify right side
    21,982.72x = 376,846,631.82
  5. Step 5: Solve for x
    x = 376,846,631.82/21,982.72
  6. Step 6: Final answer
    x = 17,142.86

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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.