Home / 11,031.30-16,506.45-8,115.30

Finding the Fourth Proportional to 11,031.30, 16,506.45 and 8,115.30

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Solution

The fourth proportional to 11,031.30, 16,506.45 and 8,115.30 is: 12,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,031.30 : 16,506.45 = 8,115.30 : x
  2. Step 2: Convert to fraction form
    11,031.30/16,506.45 = 8,115.30/x
  3. Step 3: Cross multiply
    11,031.30x = 16,506.45 × 8,115.30
  4. Step 4: Simplify right side
    11,031.30x = 133,954,793.69
  5. Step 5: Solve for x
    x = 133,954,793.69/11,031.30
  6. Step 6: Final answer
    x = 12,143.16

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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.