Home / 11,089.20-16,639.20-8,455.80

Finding the Fourth Proportional to 11,089.20, 16,639.20 and 8,455.80

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Solution

The fourth proportional to 11,089.20, 16,639.20 and 8,455.80 is: 12,687.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,089.20 : 16,639.20 = 8,455.80 : x
  2. Step 2: Convert to fraction form
    11,089.20/16,639.20 = 8,455.80/x
  3. Step 3: Cross multiply
    11,089.20x = 16,639.20 × 8,455.80
  4. Step 4: Simplify right side
    11,089.20x = 140,697,747.36
  5. Step 5: Solve for x
    x = 140,697,747.36/11,089.20
  6. Step 6: Final answer
    x = 12,687.82

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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.