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Finding the Fourth Proportional to 19,236.25, 28,859.49 and 8,143.41

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Solution

The fourth proportional to 19,236.25, 28,859.49 and 8,143.41 is: 12,217.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,236.25 : 28,859.49 = 8,143.41 : x
  2. Step 2: Convert to fraction form
    19,236.25/28,859.49 = 8,143.41/x
  3. Step 3: Cross multiply
    19,236.25x = 28,859.49 × 8,143.41
  4. Step 4: Simplify right side
    19,236.25x = 235,014,659.46
  5. Step 5: Solve for x
    x = 235,014,659.46/19,236.25
  6. Step 6: Final answer
    x = 12,217.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.