Home / 20,731.62-28,609.64-11,779.13

Finding the Fourth Proportional to 20,731.62, 28,609.64 and 11,779.13

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Solution

The fourth proportional to 20,731.62, 28,609.64 and 11,779.13 is: 16,255.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.62 : 28,609.64 = 11,779.13 : x
  2. Step 2: Convert to fraction form
    20,731.62/28,609.64 = 11,779.13/x
  3. Step 3: Cross multiply
    20,731.62x = 28,609.64 × 11,779.13
  4. Step 4: Simplify right side
    20,731.62x = 336,996,628.58
  5. Step 5: Solve for x
    x = 336,996,628.58/20,731.62
  6. Step 6: Final answer
    x = 16,255.20

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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.