Home / 20,789.79-31,183.66-7,641.33

Finding the Fourth Proportional to 20,789.79, 31,183.66 and 7,641.33

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Solution

The fourth proportional to 20,789.79, 31,183.66 and 7,641.33 is: 11,461.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.79 : 31,183.66 = 7,641.33 : x
  2. Step 2: Convert to fraction form
    20,789.79/31,183.66 = 7,641.33/x
  3. Step 3: Cross multiply
    20,789.79x = 31,183.66 × 7,641.33
  4. Step 4: Simplify right side
    20,789.79x = 238,284,636.67
  5. Step 5: Solve for x
    x = 238,284,636.67/20,789.79
  6. Step 6: Final answer
    x = 11,461.62

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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.