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Finding the Fourth Proportional to 19,910.40, 27,476.82 and 10,958.40

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Solution

The fourth proportional to 19,910.40, 27,476.82 and 10,958.40 is: 15,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,910.40 : 27,476.82 = 10,958.40 : x
  2. Step 2: Convert to fraction form
    19,910.40/27,476.82 = 10,958.40/x
  3. Step 3: Cross multiply
    19,910.40x = 27,476.82 × 10,958.40
  4. Step 4: Simplify right side
    19,910.40x = 301,101,984.29
  5. Step 5: Solve for x
    x = 301,101,984.29/19,910.40
  6. Step 6: Final answer
    x = 15,122.85

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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.