Home / 13,618.11-18,800.87-8,910.60

Finding the Fourth Proportional to 13,618.11, 18,800.87 and 8,910.60

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Solution

The fourth proportional to 13,618.11, 18,800.87 and 8,910.60 is: 12,301.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.11 : 18,800.87 = 8,910.60 : x
  2. Step 2: Convert to fraction form
    13,618.11/18,800.87 = 8,910.60/x
  3. Step 3: Cross multiply
    13,618.11x = 18,800.87 × 8,910.60
  4. Step 4: Simplify right side
    13,618.11x = 167,527,032.22
  5. Step 5: Solve for x
    x = 167,527,032.22/13,618.11
  6. Step 6: Final answer
    x = 12,301.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.