Home / 21,817.66-30,105.09-12,255.72

Finding the Fourth Proportional to 21,817.66, 30,105.09 and 12,255.72

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Solution

The fourth proportional to 21,817.66, 30,105.09 and 12,255.72 is: 16,911.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817.66 : 30,105.09 = 12,255.72 : x
  2. Step 2: Convert to fraction form
    21,817.66/30,105.09 = 12,255.72/x
  3. Step 3: Cross multiply
    21,817.66x = 30,105.09 × 12,255.72
  4. Step 4: Simplify right side
    21,817.66x = 368,959,553.61
  5. Step 5: Solve for x
    x = 368,959,553.61/21,817.66
  6. Step 6: Final answer
    x = 16,911.05

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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.