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Finding the Fourth Proportional to 19,640.76, 27,105 and 11,258.88

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Solution

The fourth proportional to 19,640.76, 27,105 and 11,258.88 is: 15,537.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.76 : 27,105 = 11,258.88 : x
  2. Step 2: Convert to fraction form
    19,640.76/27,105 = 11,258.88/x
  3. Step 3: Cross multiply
    19,640.76x = 27,105 × 11,258.88
  4. Step 4: Simplify right side
    19,640.76x = 305,171,942.40
  5. Step 5: Solve for x
    x = 305,171,942.40/19,640.76
  6. Step 6: Final answer
    x = 15,537.69

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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.