Home / 8,720.25-13,072.63-3,172.56

Finding the Fourth Proportional to 8,720.25, 13,072.63 and 3,172.56

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Solution

The fourth proportional to 8,720.25, 13,072.63 and 3,172.56 is: 4,756.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.25 : 13,072.63 = 3,172.56 : x
  2. Step 2: Convert to fraction form
    8,720.25/13,072.63 = 3,172.56/x
  3. Step 3: Cross multiply
    8,720.25x = 13,072.63 × 3,172.56
  4. Step 4: Simplify right side
    8,720.25x = 41,473,703.03
  5. Step 5: Solve for x
    x = 41,473,703.03/8,720.25
  6. Step 6: Final answer
    x = 4,756.02

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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.