Home / 18,748.30-28,131.60-8,216.86

Finding the Fourth Proportional to 18,748.30, 28,131.60 and 8,216.86

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Solution

The fourth proportional to 18,748.30, 28,131.60 and 8,216.86 is: 12,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.30 : 28,131.60 = 8,216.86 : x
  2. Step 2: Convert to fraction form
    18,748.30/28,131.60 = 8,216.86/x
  3. Step 3: Cross multiply
    18,748.30x = 28,131.60 × 8,216.86
  4. Step 4: Simplify right side
    18,748.30x = 231,153,418.78
  5. Step 5: Solve for x
    x = 231,153,418.78/18,748.30
  6. Step 6: Final answer
    x = 12,329.30

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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.