Home / 18,756.23-28,142.12-8,220.80

Finding the Fourth Proportional to 18,756.23, 28,142.12 and 8,220.80

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Solution

The fourth proportional to 18,756.23, 28,142.12 and 8,220.80 is: 12,334.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.23 : 28,142.12 = 8,220.80 : x
  2. Step 2: Convert to fraction form
    18,756.23/28,142.12 = 8,220.80/x
  3. Step 3: Cross multiply
    18,756.23x = 28,142.12 × 8,220.80
  4. Step 4: Simplify right side
    18,756.23x = 231,350,698.99
  5. Step 5: Solve for x
    x = 231,350,698.99/18,756.23
  6. Step 6: Final answer
    x = 12,334.61

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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.