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Finding the Fourth Proportional to 18,762.89, 28,152.20 and 8,227.46

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Solution

The fourth proportional to 18,762.89, 28,152.20 and 8,227.46 is: 12,344.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.89 : 28,152.20 = 8,227.46 : x
  2. Step 2: Convert to fraction form
    18,762.89/28,152.20 = 8,227.46/x
  3. Step 3: Cross multiply
    18,762.89x = 28,152.20 × 8,227.46
  4. Step 4: Simplify right side
    18,762.89x = 231,621,190.36
  5. Step 5: Solve for x
    x = 231,621,190.36/18,762.89
  6. Step 6: Final answer
    x = 12,344.65

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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.