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Finding the Fourth Proportional to 18,952.92, 28,431.12 and 4,912.92

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Solution

The fourth proportional to 18,952.92, 28,431.12 and 4,912.92 is: 7,369.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,952.92 : 28,431.12 = 4,912.92 : x
  2. Step 2: Convert to fraction form
    18,952.92/28,431.12 = 4,912.92/x
  3. Step 3: Cross multiply
    18,952.92x = 28,431.12 × 4,912.92
  4. Step 4: Simplify right side
    18,952.92x = 139,679,818.07
  5. Step 5: Solve for x
    x = 139,679,818.07/18,952.92
  6. Step 6: Final answer
    x = 7,369.83

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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.