Home / 21,723.08-29,979.02-13,223.85

Finding the Fourth Proportional to 21,723.08, 29,979.02 and 13,223.85

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Solution

The fourth proportional to 21,723.08, 29,979.02 and 13,223.85 is: 18,249.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.08 : 29,979.02 = 13,223.85 : x
  2. Step 2: Convert to fraction form
    21,723.08/29,979.02 = 13,223.85/x
  3. Step 3: Cross multiply
    21,723.08x = 29,979.02 × 13,223.85
  4. Step 4: Simplify right side
    21,723.08x = 396,438,063.63
  5. Step 5: Solve for x
    x = 396,438,063.63/21,723.08
  6. Step 6: Final answer
    x = 18,249.62

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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.