Home / 21,722.25-29,976.74-12,290.61

Finding the Fourth Proportional to 21,722.25, 29,976.74 and 12,290.61

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Solution

The fourth proportional to 21,722.25, 29,976.74 and 12,290.61 is: 16,961.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.25 : 29,976.74 = 12,290.61 : x
  2. Step 2: Convert to fraction form
    21,722.25/29,976.74 = 12,290.61/x
  3. Step 3: Cross multiply
    21,722.25x = 29,976.74 × 12,290.61
  4. Step 4: Simplify right side
    21,722.25x = 368,432,358.96
  5. Step 5: Solve for x
    x = 368,432,358.96/21,722.25
  6. Step 6: Final answer
    x = 16,961.06

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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.