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Finding the Fourth Proportional to 19,408.65, 29,119.13 and 6,928.41

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Solution

The fourth proportional to 19,408.65, 29,119.13 and 6,928.41 is: 10,394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,408.65 : 29,119.13 = 6,928.41 : x
  2. Step 2: Convert to fraction form
    19,408.65/29,119.13 = 6,928.41/x
  3. Step 3: Cross multiply
    19,408.65x = 29,119.13 × 6,928.41
  4. Step 4: Simplify right side
    19,408.65x = 201,749,116.58
  5. Step 5: Solve for x
    x = 201,749,116.58/19,408.65
  6. Step 6: Final answer
    x = 10,394.80

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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.