Home / 10,245.02-15,379.68-8,621.78

Finding the Fourth Proportional to 10,245.02, 15,379.68 and 8,621.78

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Solution

The fourth proportional to 10,245.02, 15,379.68 and 8,621.78 is: 12,942.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,245.02 : 15,379.68 = 8,621.78 : x
  2. Step 2: Convert to fraction form
    10,245.02/15,379.68 = 8,621.78/x
  3. Step 3: Cross multiply
    10,245.02x = 15,379.68 × 8,621.78
  4. Step 4: Simplify right side
    10,245.02x = 132,600,217.43
  5. Step 5: Solve for x
    x = 132,600,217.43/10,245.02
  6. Step 6: Final answer
    x = 12,942.89

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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.