Home / 20,789.96-31,184.96-5,207.58

Finding the Fourth Proportional to 20,789.96, 31,184.96 and 5,207.58

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Solution

The fourth proportional to 20,789.96, 31,184.96 and 5,207.58 is: 7,811.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.96 : 31,184.96 = 5,207.58 : x
  2. Step 2: Convert to fraction form
    20,789.96/31,184.96 = 5,207.58/x
  3. Step 3: Cross multiply
    20,789.96x = 31,184.96 × 5,207.58
  4. Step 4: Simplify right side
    20,789.96x = 162,398,147.96
  5. Step 5: Solve for x
    x = 162,398,147.96/20,789.96
  6. Step 6: Final answer
    x = 7,811.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.