Home / 20,823.96-31,209.12-7,660.74

Finding the Fourth Proportional to 20,823.96, 31,209.12 and 7,660.74

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Solution

The fourth proportional to 20,823.96, 31,209.12 and 7,660.74 is: 11,481.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.96 : 31,209.12 = 7,660.74 : x
  2. Step 2: Convert to fraction form
    20,823.96/31,209.12 = 7,660.74/x
  3. Step 3: Cross multiply
    20,823.96x = 31,209.12 × 7,660.74
  4. Step 4: Simplify right side
    20,823.96x = 239,084,953.95
  5. Step 5: Solve for x
    x = 239,084,953.95/20,823.96
  6. Step 6: Final answer
    x = 11,481.24

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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.