Home / 20,579.30-28,399.98-11,628.12

Finding the Fourth Proportional to 20,579.30, 28,399.98 and 11,628.12

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Solution

The fourth proportional to 20,579.30, 28,399.98 and 11,628.12 is: 16,047.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.30 : 28,399.98 = 11,628.12 : x
  2. Step 2: Convert to fraction form
    20,579.30/28,399.98 = 11,628.12/x
  3. Step 3: Cross multiply
    20,579.30x = 28,399.98 × 11,628.12
  4. Step 4: Simplify right side
    20,579.30x = 330,238,375.44
  5. Step 5: Solve for x
    x = 330,238,375.44/20,579.30
  6. Step 6: Final answer
    x = 16,047.12

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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.