Home / 19,982.20-29,949.30-8,289.40

Finding the Fourth Proportional to 19,982.20, 29,949.30 and 8,289.40

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Solution

The fourth proportional to 19,982.20, 29,949.30 and 8,289.40 is: 12,424.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,982.20 : 29,949.30 = 8,289.40 : x
  2. Step 2: Convert to fraction form
    19,982.20/29,949.30 = 8,289.40/x
  3. Step 3: Cross multiply
    19,982.20x = 29,949.30 × 8,289.40
  4. Step 4: Simplify right side
    19,982.20x = 248,261,727.42
  5. Step 5: Solve for x
    x = 248,261,727.42/19,982.20
  6. Step 6: Final answer
    x = 12,424.14

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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.