Home / 20,311.32-28,029.84-11,359.32

Finding the Fourth Proportional to 20,311.32, 28,029.84 and 11,359.32

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Solution

The fourth proportional to 20,311.32, 28,029.84 and 11,359.32 is: 15,675.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.32 : 28,029.84 = 11,359.32 : x
  2. Step 2: Convert to fraction form
    20,311.32/28,029.84 = 11,359.32/x
  3. Step 3: Cross multiply
    20,311.32x = 28,029.84 × 11,359.32
  4. Step 4: Simplify right side
    20,311.32x = 318,399,922.11
  5. Step 5: Solve for x
    x = 318,399,922.11/20,311.32
  6. Step 6: Final answer
    x = 15,675.98

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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.