Home / 12,187.16-18,269.73-4,390.50

Finding the Fourth Proportional to 12,187.16, 18,269.73 and 4,390.50

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Solution

The fourth proportional to 12,187.16, 18,269.73 and 4,390.50 is: 6,581.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.16 : 18,269.73 = 4,390.50 : x
  2. Step 2: Convert to fraction form
    12,187.16/18,269.73 = 4,390.50/x
  3. Step 3: Cross multiply
    12,187.16x = 18,269.73 × 4,390.50
  4. Step 4: Simplify right side
    12,187.16x = 80,213,249.57
  5. Step 5: Solve for x
    x = 80,213,249.57/12,187.16
  6. Step 6: Final answer
    x = 6,581.79

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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.