Home / 10,889.85-16,318.39-8,103.45

Finding the Fourth Proportional to 10,889.85, 16,318.39 and 8,103.45

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Solution

The fourth proportional to 10,889.85, 16,318.39 and 8,103.45 is: 12,142.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,889.85 : 16,318.39 = 8,103.45 : x
  2. Step 2: Convert to fraction form
    10,889.85/16,318.39 = 8,103.45/x
  3. Step 3: Cross multiply
    10,889.85x = 16,318.39 × 8,103.45
  4. Step 4: Simplify right side
    10,889.85x = 132,235,257.45
  5. Step 5: Solve for x
    x = 132,235,257.45/10,889.85
  6. Step 6: Final answer
    x = 12,142.98

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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.