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Finding the Fourth Proportional to 19,620.48, 27,074.88 and 11,660.88

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Solution

The fourth proportional to 19,620.48, 27,074.88 and 11,660.88 is: 16,091.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,620.48 : 27,074.88 = 11,660.88 : x
  2. Step 2: Convert to fraction form
    19,620.48/27,074.88 = 11,660.88/x
  3. Step 3: Cross multiply
    19,620.48x = 27,074.88 × 11,660.88
  4. Step 4: Simplify right side
    19,620.48x = 315,716,926.69
  5. Step 5: Solve for x
    x = 315,716,926.69/19,620.48
  6. Step 6: Final answer
    x = 16,091.19

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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.