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Finding the Fourth Proportional to 19,889.34, 27,447.70 and 10,936.99

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Solution

The fourth proportional to 19,889.34, 27,447.70 and 10,936.99 is: 15,093.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.34 : 27,447.70 = 10,936.99 : x
  2. Step 2: Convert to fraction form
    19,889.34/27,447.70 = 10,936.99/x
  3. Step 3: Cross multiply
    19,889.34x = 27,447.70 × 10,936.99
  4. Step 4: Simplify right side
    19,889.34x = 300,195,220.42
  5. Step 5: Solve for x
    x = 300,195,220.42/19,889.34
  6. Step 6: Final answer
    x = 15,093.27

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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.