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Finding the Fourth Proportional to 19,409.21, 29,119.97 and 6,928.97

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Solution

The fourth proportional to 19,409.21, 29,119.97 and 6,928.97 is: 10,395.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,409.21 : 29,119.97 = 6,928.97 : x
  2. Step 2: Convert to fraction form
    19,409.21/29,119.97 = 6,928.97/x
  3. Step 3: Cross multiply
    19,409.21x = 29,119.97 × 6,928.97
  4. Step 4: Simplify right side
    19,409.21x = 201,771,434.05
  5. Step 5: Solve for x
    x = 201,771,434.05/19,409.21
  6. Step 6: Final answer
    x = 10,395.65

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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.