Home / 8,720.41-13,078.31-3,788.89

Finding the Fourth Proportional to 8,720.41, 13,078.31 and 3,788.89

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Solution

The fourth proportional to 8,720.41, 13,078.31 and 3,788.89 is: 5,682.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.41 : 13,078.31 = 3,788.89 : x
  2. Step 2: Convert to fraction form
    8,720.41/13,078.31 = 3,788.89/x
  3. Step 3: Cross multiply
    8,720.41x = 13,078.31 × 3,788.89
  4. Step 4: Simplify right side
    8,720.41x = 49,552,299.90
  5. Step 5: Solve for x
    x = 49,552,299.90/8,720.41
  6. Step 6: Final answer
    x = 5,682.34

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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.