Home / 20,731.80-28,608.30-11,779.44

Finding the Fourth Proportional to 20,731.80, 28,608.30 and 11,779.44

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Solution

The fourth proportional to 20,731.80, 28,608.30 and 11,779.44 is: 16,254.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.80 : 28,608.30 = 11,779.44 : x
  2. Step 2: Convert to fraction form
    20,731.80/28,608.30 = 11,779.44/x
  3. Step 3: Cross multiply
    20,731.80x = 28,608.30 × 11,779.44
  4. Step 4: Simplify right side
    20,731.80x = 336,989,753.35
  5. Step 5: Solve for x
    x = 336,989,753.35/20,731.80
  6. Step 6: Final answer
    x = 16,254.73

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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.