Home / 12,221.97-16,857.61-11,216.92

Finding the Fourth Proportional to 12,221.97, 16,857.61 and 11,216.92

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Solution

The fourth proportional to 12,221.97, 16,857.61 and 11,216.92 is: 15,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.97 : 16,857.61 = 11,216.92 : x
  2. Step 2: Convert to fraction form
    12,221.97/16,857.61 = 11,216.92/x
  3. Step 3: Cross multiply
    12,221.97x = 16,857.61 × 11,216.92
  4. Step 4: Simplify right side
    12,221.97x = 189,090,420.62
  5. Step 5: Solve for x
    x = 189,090,420.62/12,221.97
  6. Step 6: Final answer
    x = 15,471.35

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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.