Home / 19,385.20-29,077.80-6,919.30

Finding the Fourth Proportional to 19,385.20, 29,077.80 and 6,919.30

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Solution

The fourth proportional to 19,385.20, 29,077.80 and 6,919.30 is: 10,378.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,385.20 : 29,077.80 = 6,919.30 : x
  2. Step 2: Convert to fraction form
    19,385.20/29,077.80 = 6,919.30/x
  3. Step 3: Cross multiply
    19,385.20x = 29,077.80 × 6,919.30
  4. Step 4: Simplify right side
    19,385.20x = 201,198,021.54
  5. Step 5: Solve for x
    x = 201,198,021.54/19,385.20
  6. Step 6: Final answer
    x = 10,378.95

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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.