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Finding the Fourth Proportional to 18,846.79, 28,270.20 and 8,314.58

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Solution

The fourth proportional to 18,846.79, 28,270.20 and 8,314.58 is: 12,471.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,846.79 : 28,270.20 = 8,314.58 : x
  2. Step 2: Convert to fraction form
    18,846.79/28,270.20 = 8,314.58/x
  3. Step 3: Cross multiply
    18,846.79x = 28,270.20 × 8,314.58
  4. Step 4: Simplify right side
    18,846.79x = 235,054,839.52
  5. Step 5: Solve for x
    x = 235,054,839.52/18,846.79
  6. Step 6: Final answer
    x = 12,471.88

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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.