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Finding the Fourth Proportional to 18,762.88, 28,131.36 and 8,227.84

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Solution

The fourth proportional to 18,762.88, 28,131.36 and 8,227.84 is: 12,336.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.88 : 28,131.36 = 8,227.84 : x
  2. Step 2: Convert to fraction form
    18,762.88/28,131.36 = 8,227.84/x
  3. Step 3: Cross multiply
    18,762.88x = 28,131.36 × 8,227.84
  4. Step 4: Simplify right side
    18,762.88x = 231,460,329.06
  5. Step 5: Solve for x
    x = 231,460,329.06/18,762.88
  6. Step 6: Final answer
    x = 12,336.08

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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.