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Finding the Fourth Proportional to 12,162.57, 18,243.86 and 2,928.57

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Solution

The fourth proportional to 12,162.57, 18,243.86 and 2,928.57 is: 4,392.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.57 : 18,243.86 = 2,928.57 : x
  2. Step 2: Convert to fraction form
    12,162.57/18,243.86 = 2,928.57/x
  3. Step 3: Cross multiply
    12,162.57x = 18,243.86 × 2,928.57
  4. Step 4: Simplify right side
    12,162.57x = 53,428,406.44
  5. Step 5: Solve for x
    x = 53,428,406.44/12,162.57
  6. Step 6: Final answer
    x = 4,392.86

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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.