Home / 20,579.20-28,403.94-11,631.88

Finding the Fourth Proportional to 20,579.20, 28,403.94 and 11,631.88

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Solution

The fourth proportional to 20,579.20, 28,403.94 and 11,631.88 is: 16,054.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.20 : 28,403.94 = 11,631.88 : x
  2. Step 2: Convert to fraction form
    20,579.20/28,403.94 = 11,631.88/x
  3. Step 3: Cross multiply
    20,579.20x = 28,403.94 × 11,631.88
  4. Step 4: Simplify right side
    20,579.20x = 330,391,221.61
  5. Step 5: Solve for x
    x = 330,391,221.61/20,579.20
  6. Step 6: Final answer
    x = 16,054.62

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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.