Home / 13,720.50-20,579.85-7,150.41

Finding the Fourth Proportional to 13,720.50, 20,579.85 and 7,150.41

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Solution

The fourth proportional to 13,720.50, 20,579.85 and 7,150.41 is: 10,725.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.50 : 20,579.85 = 7,150.41 : x
  2. Step 2: Convert to fraction form
    13,720.50/20,579.85 = 7,150.41/x
  3. Step 3: Cross multiply
    13,720.50x = 20,579.85 × 7,150.41
  4. Step 4: Simplify right side
    13,720.50x = 147,154,365.24
  5. Step 5: Solve for x
    x = 147,154,365.24/13,720.50
  6. Step 6: Final answer
    x = 10,725.15

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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.