Home / 8,720.45-13,072.70-3,788.31

Finding the Fourth Proportional to 8,720.45, 13,072.70 and 3,788.31

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Solution

The fourth proportional to 8,720.45, 13,072.70 and 3,788.31 is: 5,679.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.45 : 13,072.70 = 3,788.31 : x
  2. Step 2: Convert to fraction form
    8,720.45/13,072.70 = 3,788.31/x
  3. Step 3: Cross multiply
    8,720.45x = 13,072.70 × 3,788.31
  4. Step 4: Simplify right side
    8,720.45x = 49,523,440.14
  5. Step 5: Solve for x
    x = 49,523,440.14/8,720.45
  6. Step 6: Final answer
    x = 5,679.00

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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.