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Finding the Fourth Proportional to 18,561.76, 27,772.84 and 13,025.92

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Solution

The fourth proportional to 18,561.76, 27,772.84 and 13,025.92 is: 19,489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.76 : 27,772.84 = 13,025.92 : x
  2. Step 2: Convert to fraction form
    18,561.76/27,772.84 = 13,025.92/x
  3. Step 3: Cross multiply
    18,561.76x = 27,772.84 × 13,025.92
  4. Step 4: Simplify right side
    18,561.76x = 361,766,792.01
  5. Step 5: Solve for x
    x = 361,766,792.01/18,561.76
  6. Step 6: Final answer
    x = 19,489.90

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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.