Home / 10,780.20-16,151.10-8,821.80

Finding the Fourth Proportional to 10,780.20, 16,151.10 and 8,821.80

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Solution

The fourth proportional to 10,780.20, 16,151.10 and 8,821.80 is: 13,216.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,780.20 : 16,151.10 = 8,821.80 : x
  2. Step 2: Convert to fraction form
    10,780.20/16,151.10 = 8,821.80/x
  3. Step 3: Cross multiply
    10,780.20x = 16,151.10 × 8,821.80
  4. Step 4: Simplify right side
    10,780.20x = 142,481,773.98
  5. Step 5: Solve for x
    x = 142,481,773.98/10,780.20
  6. Step 6: Final answer
    x = 13,216.99

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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.