Home / 12,089.91-18,140.45-5,518.11

Finding the Fourth Proportional to 12,089.91, 18,140.45 and 5,518.11

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Solution

The fourth proportional to 12,089.91, 18,140.45 and 5,518.11 is: 8,279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,089.91 : 18,140.45 = 5,518.11 : x
  2. Step 2: Convert to fraction form
    12,089.91/18,140.45 = 5,518.11/x
  3. Step 3: Cross multiply
    12,089.91x = 18,140.45 × 5,518.11
  4. Step 4: Simplify right side
    12,089.91x = 100,100,998.55
  5. Step 5: Solve for x
    x = 100,100,998.55/12,089.91
  6. Step 6: Final answer
    x = 8,279.71

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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.