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Finding the Fourth Proportional to 19,198.90, 28,803.21 and 5,347.90

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Solution

The fourth proportional to 19,198.90, 28,803.21 and 5,347.90 is: 8,023.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,198.90 : 28,803.21 = 5,347.90 : x
  2. Step 2: Convert to fraction form
    19,198.90/28,803.21 = 5,347.90/x
  3. Step 3: Cross multiply
    19,198.90x = 28,803.21 × 5,347.90
  4. Step 4: Simplify right side
    19,198.90x = 154,036,629.22
  5. Step 5: Solve for x
    x = 154,036,629.22/19,198.90
  6. Step 6: Final answer
    x = 8,023.20

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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.