Home / 19,979.28-29,984.04-11,221.56

Finding the Fourth Proportional to 19,979.28, 29,984.04 and 11,221.56

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Solution

The fourth proportional to 19,979.28, 29,984.04 and 11,221.56 is: 16,840.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.28 : 29,984.04 = 11,221.56 : x
  2. Step 2: Convert to fraction form
    19,979.28/29,984.04 = 11,221.56/x
  3. Step 3: Cross multiply
    19,979.28x = 29,984.04 × 11,221.56
  4. Step 4: Simplify right side
    19,979.28x = 336,467,703.90
  5. Step 5: Solve for x
    x = 336,467,703.90/19,979.28
  6. Step 6: Final answer
    x = 16,840.83

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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.