Home / 12,221.12-16,856.45-11,216.08

Finding the Fourth Proportional to 12,221.12, 16,856.45 and 11,216.08

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Solution

The fourth proportional to 12,221.12, 16,856.45 and 11,216.08 is: 15,470.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.12 : 16,856.45 = 11,216.08 : x
  2. Step 2: Convert to fraction form
    12,221.12/16,856.45 = 11,216.08/x
  3. Step 3: Cross multiply
    12,221.12x = 16,856.45 × 11,216.08
  4. Step 4: Simplify right side
    12,221.12x = 189,063,267.04
  5. Step 5: Solve for x
    x = 189,063,267.04/12,221.12
  6. Step 6: Final answer
    x = 15,470.21

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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.