Home / 21,817.25-30,105.27-12,255.81

Finding the Fourth Proportional to 21,817.25, 30,105.27 and 12,255.81

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Solution

The fourth proportional to 21,817.25, 30,105.27 and 12,255.81 is: 16,911.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817.25 : 30,105.27 = 12,255.81 : x
  2. Step 2: Convert to fraction form
    21,817.25/30,105.27 = 12,255.81/x
  3. Step 3: Cross multiply
    21,817.25x = 30,105.27 × 12,255.81
  4. Step 4: Simplify right side
    21,817.25x = 368,964,356.22
  5. Step 5: Solve for x
    x = 368,964,356.22/21,817.25
  6. Step 6: Final answer
    x = 16,911.59

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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.