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Finding the Fourth Proportional to 13,659.92, 18,849 and 8,622.20

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Solution

The fourth proportional to 13,659.92, 18,849 and 8,622.20 is: 11,897.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.92 : 18,849 = 8,622.20 : x
  2. Step 2: Convert to fraction form
    13,659.92/18,849 = 8,622.20/x
  3. Step 3: Cross multiply
    13,659.92x = 18,849 × 8,622.20
  4. Step 4: Simplify right side
    13,659.92x = 162,519,847.80
  5. Step 5: Solve for x
    x = 162,519,847.80/13,659.92
  6. Step 6: Final answer
    x = 11,897.57

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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.