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Finding the Fourth Proportional to 13,596.87, 18,763.86 and 8,218.57

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Solution

The fourth proportional to 13,596.87, 18,763.86 and 8,218.57 is: 11,341.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,596.87 : 18,763.86 = 8,218.57 : x
  2. Step 2: Convert to fraction form
    13,596.87/18,763.86 = 8,218.57/x
  3. Step 3: Cross multiply
    13,596.87x = 18,763.86 × 8,218.57
  4. Step 4: Simplify right side
    13,596.87x = 154,212,096.88
  5. Step 5: Solve for x
    x = 154,212,096.88/13,596.87
  6. Step 6: Final answer
    x = 11,341.74

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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.