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Finding the Fourth Proportional to 19,865.11, 29,797.68 and 7,388.29

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Solution

The fourth proportional to 19,865.11, 29,797.68 and 7,388.29 is: 11,082.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,865.11 : 29,797.68 = 7,388.29 : x
  2. Step 2: Convert to fraction form
    19,865.11/29,797.68 = 7,388.29/x
  3. Step 3: Cross multiply
    19,865.11x = 29,797.68 × 7,388.29
  4. Step 4: Simplify right side
    19,865.11x = 220,153,901.17
  5. Step 5: Solve for x
    x = 220,153,901.17/19,865.11
  6. Step 6: Final answer
    x = 11,082.44

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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.