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Finding the Fourth Proportional to 19,409.93, 29,121.04 and 6,929.68

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Solution

The fourth proportional to 19,409.93, 29,121.04 and 6,929.68 is: 10,396.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,409.93 : 29,121.04 = 6,929.68 : x
  2. Step 2: Convert to fraction form
    19,409.93/29,121.04 = 6,929.68/x
  3. Step 3: Cross multiply
    19,409.93x = 29,121.04 × 6,929.68
  4. Step 4: Simplify right side
    19,409.93x = 201,799,488.47
  5. Step 5: Solve for x
    x = 201,799,488.47/19,409.93
  6. Step 6: Final answer
    x = 10,396.72

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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.