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Finding the Fourth Proportional to 19,398.96, 29,105.76 and 7,720.44

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Solution

The fourth proportional to 19,398.96, 29,105.76 and 7,720.44 is: 11,583.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.96 : 29,105.76 = 7,720.44 : x
  2. Step 2: Convert to fraction form
    19,398.96/29,105.76 = 7,720.44/x
  3. Step 3: Cross multiply
    19,398.96x = 29,105.76 × 7,720.44
  4. Step 4: Simplify right side
    19,398.96x = 224,709,273.73
  5. Step 5: Solve for x
    x = 224,709,273.73/19,398.96
  6. Step 6: Final answer
    x = 11,583.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.