Home / 20,089.24-27,723.12-12,129.90

Finding the Fourth Proportional to 20,089.24, 27,723.12 and 12,129.90

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Solution

The fourth proportional to 20,089.24, 27,723.12 and 12,129.90 is: 16,739.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,089.24 : 27,723.12 = 12,129.90 : x
  2. Step 2: Convert to fraction form
    20,089.24/27,723.12 = 12,129.90/x
  3. Step 3: Cross multiply
    20,089.24x = 27,723.12 × 12,129.90
  4. Step 4: Simplify right side
    20,089.24x = 336,278,673.29
  5. Step 5: Solve for x
    x = 336,278,673.29/20,089.24
  6. Step 6: Final answer
    x = 16,739.24

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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.