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Finding the Fourth Proportional to 19,806.64, 27,335.64 and 11,425.84

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Solution

The fourth proportional to 19,806.64, 27,335.64 and 11,425.84 is: 15,769.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,806.64 : 27,335.64 = 11,425.84 : x
  2. Step 2: Convert to fraction form
    19,806.64/27,335.64 = 11,425.84/x
  3. Step 3: Cross multiply
    19,806.64x = 27,335.64 × 11,425.84
  4. Step 4: Simplify right side
    19,806.64x = 312,332,648.94
  5. Step 5: Solve for x
    x = 312,332,648.94/19,806.64
  6. Step 6: Final answer
    x = 15,769.09

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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.