Home / 20,716.90-31,079.40-8,234.80

Finding the Fourth Proportional to 20,716.90, 31,079.40 and 8,234.80

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Solution

The fourth proportional to 20,716.90, 31,079.40 and 8,234.80 is: 12,353.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.90 : 31,079.40 = 8,234.80 : x
  2. Step 2: Convert to fraction form
    20,716.90/31,079.40 = 8,234.80/x
  3. Step 3: Cross multiply
    20,716.90x = 31,079.40 × 8,234.80
  4. Step 4: Simplify right side
    20,716.90x = 255,932,643.12
  5. Step 5: Solve for x
    x = 255,932,643.12/20,716.90
  6. Step 6: Final answer
    x = 12,353.81

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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.