Home / 12,680.10-19,021.50-5,280.44

Finding the Fourth Proportional to 12,680.10, 19,021.50 and 5,280.44

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Solution

The fourth proportional to 12,680.10, 19,021.50 and 5,280.44 is: 7,921.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,680.10 : 19,021.50 = 5,280.44 : x
  2. Step 2: Convert to fraction form
    12,680.10/19,021.50 = 5,280.44/x
  3. Step 3: Cross multiply
    12,680.10x = 19,021.50 × 5,280.44
  4. Step 4: Simplify right side
    12,680.10x = 100,441,794.35
  5. Step 5: Solve for x
    x = 100,441,794.35/12,680.10
  6. Step 6: Final answer
    x = 7,921.21

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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.