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Finding the Fourth Proportional to 12,187.92, 18,282.96 and 3,869.76

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Solution

The fourth proportional to 12,187.92, 18,282.96 and 3,869.76 is: 5,804.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.92 : 18,282.96 = 3,869.76 : x
  2. Step 2: Convert to fraction form
    12,187.92/18,282.96 = 3,869.76/x
  3. Step 3: Cross multiply
    12,187.92x = 18,282.96 × 3,869.76
  4. Step 4: Simplify right side
    12,187.92x = 70,750,667.29
  5. Step 5: Solve for x
    x = 70,750,667.29/12,187.92
  6. Step 6: Final answer
    x = 5,804.98

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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.