Home / 20,872.28-31,300.62-8,388.08

Finding the Fourth Proportional to 20,872.28, 31,300.62 and 8,388.08

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Solution

The fourth proportional to 20,872.28, 31,300.62 and 8,388.08 is: 12,578.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.28 : 31,300.62 = 8,388.08 : x
  2. Step 2: Convert to fraction form
    20,872.28/31,300.62 = 8,388.08/x
  3. Step 3: Cross multiply
    20,872.28x = 31,300.62 × 8,388.08
  4. Step 4: Simplify right side
    20,872.28x = 262,551,948.11
  5. Step 5: Solve for x
    x = 262,551,948.11/20,872.28
  6. Step 6: Final answer
    x = 12,578.98

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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.