Home / 13,790.86-20,683.17-3,929.92

Finding the Fourth Proportional to 13,790.86, 20,683.17 and 3,929.92

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Solution

The fourth proportional to 13,790.86, 20,683.17 and 3,929.92 is: 5,893.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.86 : 20,683.17 = 3,929.92 : x
  2. Step 2: Convert to fraction form
    13,790.86/20,683.17 = 3,929.92/x
  3. Step 3: Cross multiply
    13,790.86x = 20,683.17 × 3,929.92
  4. Step 4: Simplify right side
    13,790.86x = 81,283,203.45
  5. Step 5: Solve for x
    x = 81,283,203.45/13,790.86
  6. Step 6: Final answer
    x = 5,893.99

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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.