Home / 13,911.87-19,187.20-12,229.71

Finding the Fourth Proportional to 13,911.87, 19,187.20 and 12,229.71

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Solution

The fourth proportional to 13,911.87, 19,187.20 and 12,229.71 is: 16,867.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.87 : 19,187.20 = 12,229.71 : x
  2. Step 2: Convert to fraction form
    13,911.87/19,187.20 = 12,229.71/x
  3. Step 3: Cross multiply
    13,911.87x = 19,187.20 × 12,229.71
  4. Step 4: Simplify right side
    13,911.87x = 234,653,891.71
  5. Step 5: Solve for x
    x = 234,653,891.71/13,911.87
  6. Step 6: Final answer
    x = 16,867.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.