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Finding the Fourth Proportional to 19,911.66, 27,478.22 and 10,958.92

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Solution

The fourth proportional to 19,911.66, 27,478.22 and 10,958.92 is: 15,123.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.66 : 27,478.22 = 10,958.92 : x
  2. Step 2: Convert to fraction form
    19,911.66/27,478.22 = 10,958.92/x
  3. Step 3: Cross multiply
    19,911.66x = 27,478.22 × 10,958.92
  4. Step 4: Simplify right side
    19,911.66x = 301,131,614.72
  5. Step 5: Solve for x
    x = 301,131,614.72/19,911.66
  6. Step 6: Final answer
    x = 15,123.38

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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.