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Finding the Fourth Proportional to 19,911.70, 29,859.04 and 6,758.11

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Solution

The fourth proportional to 19,911.70, 29,859.04 and 6,758.11 is: 10,134.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.70 : 29,859.04 = 6,758.11 : x
  2. Step 2: Convert to fraction form
    19,911.70/29,859.04 = 6,758.11/x
  3. Step 3: Cross multiply
    19,911.70x = 29,859.04 × 6,758.11
  4. Step 4: Simplify right side
    19,911.70x = 201,790,676.81
  5. Step 5: Solve for x
    x = 201,790,676.81/19,911.70
  6. Step 6: Final answer
    x = 10,134.28

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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.