Home / 12,187.11-18,280.76-3,867.15

Finding the Fourth Proportional to 12,187.11, 18,280.76 and 3,867.15

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Solution

The fourth proportional to 12,187.11, 18,280.76 and 3,867.15 is: 5,800.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.11 : 18,280.76 = 3,867.15 : x
  2. Step 2: Convert to fraction form
    12,187.11/18,280.76 = 3,867.15/x
  3. Step 3: Cross multiply
    12,187.11x = 18,280.76 × 3,867.15
  4. Step 4: Simplify right side
    12,187.11x = 70,694,421.70
  5. Step 5: Solve for x
    x = 70,694,421.70/12,187.11
  6. Step 6: Final answer
    x = 5,800.75

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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.