Home / 20,311.08-28,028.58-11,359.56

Finding the Fourth Proportional to 20,311.08, 28,028.58 and 11,359.56

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Solution

The fourth proportional to 20,311.08, 28,028.58 and 11,359.56 is: 15,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.08 : 28,028.58 = 11,359.56 : x
  2. Step 2: Convert to fraction form
    20,311.08/28,028.58 = 11,359.56/x
  3. Step 3: Cross multiply
    20,311.08x = 28,028.58 × 11,359.56
  4. Step 4: Simplify right side
    20,311.08x = 318,392,336.22
  5. Step 5: Solve for x
    x = 318,392,336.22/20,311.08
  6. Step 6: Final answer
    x = 15,675.80

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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.