Home / 20,579.13-28,399.01-12,081.42

Finding the Fourth Proportional to 20,579.13, 28,399.01 and 12,081.42

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Solution

The fourth proportional to 20,579.13, 28,399.01 and 12,081.42 is: 16,672.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.13 : 28,399.01 = 12,081.42 : x
  2. Step 2: Convert to fraction form
    20,579.13/28,399.01 = 12,081.42/x
  3. Step 3: Cross multiply
    20,579.13x = 28,399.01 × 12,081.42
  4. Step 4: Simplify right side
    20,579.13x = 343,100,306.99
  5. Step 5: Solve for x
    x = 343,100,306.99/20,579.13
  6. Step 6: Final answer
    x = 16,672.25

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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.