Home / 21,187.20-31,793.40-8,040.90

Finding the Fourth Proportional to 21,187.20, 31,793.40 and 8,040.90

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Solution

The fourth proportional to 21,187.20, 31,793.40 and 8,040.90 is: 12,066.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.20 : 31,793.40 = 8,040.90 : x
  2. Step 2: Convert to fraction form
    21,187.20/31,793.40 = 8,040.90/x
  3. Step 3: Cross multiply
    21,187.20x = 31,793.40 × 8,040.90
  4. Step 4: Simplify right side
    21,187.20x = 255,647,550.06
  5. Step 5: Solve for x
    x = 255,647,550.06/21,187.20
  6. Step 6: Final answer
    x = 12,066.13

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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.