Home / 13,673.78-20,510.38-3,812.80

Finding the Fourth Proportional to 13,673.78, 20,510.38 and 3,812.80

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Solution

The fourth proportional to 13,673.78, 20,510.38 and 3,812.80 is: 5,719.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,673.78 : 20,510.38 = 3,812.80 : x
  2. Step 2: Convert to fraction form
    13,673.78/20,510.38 = 3,812.80/x
  3. Step 3: Cross multiply
    13,673.78x = 20,510.38 × 3,812.80
  4. Step 4: Simplify right side
    13,673.78x = 78,201,976.86
  5. Step 5: Solve for x
    x = 78,201,976.86/13,673.78
  6. Step 6: Final answer
    x = 5,719.12

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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.