Home / 10,411.90-15,619.20-5,149.60

Finding the Fourth Proportional to 10,411.90, 15,619.20 and 5,149.60

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Solution

The fourth proportional to 10,411.90, 15,619.20 and 5,149.60 is: 7,725.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,411.90 : 15,619.20 = 5,149.60 : x
  2. Step 2: Convert to fraction form
    10,411.90/15,619.20 = 5,149.60/x
  3. Step 3: Cross multiply
    10,411.90x = 15,619.20 × 5,149.60
  4. Step 4: Simplify right side
    10,411.90x = 80,432,632.32
  5. Step 5: Solve for x
    x = 80,432,632.32/10,411.90
  6. Step 6: Final answer
    x = 7,725.07

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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.