Home / 22,221.08-30,665.12-12,789.64

Finding the Fourth Proportional to 22,221.08, 30,665.12 and 12,789.64

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Solution

The fourth proportional to 22,221.08, 30,665.12 and 12,789.64 is: 17,649.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,221.08 : 30,665.12 = 12,789.64 : x
  2. Step 2: Convert to fraction form
    22,221.08/30,665.12 = 12,789.64/x
  3. Step 3: Cross multiply
    22,221.08x = 30,665.12 × 12,789.64
  4. Step 4: Simplify right side
    22,221.08x = 392,195,845.36
  5. Step 5: Solve for x
    x = 392,195,845.36/22,221.08
  6. Step 6: Final answer
    x = 17,649.72

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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.