Home / 13,708.13-18,917.22-7,420.50

Finding the Fourth Proportional to 13,708.13, 18,917.22 and 7,420.50

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Solution

The fourth proportional to 13,708.13, 18,917.22 and 7,420.50 is: 10,240.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.13 : 18,917.22 = 7,420.50 : x
  2. Step 2: Convert to fraction form
    13,708.13/18,917.22 = 7,420.50/x
  3. Step 3: Cross multiply
    13,708.13x = 18,917.22 × 7,420.50
  4. Step 4: Simplify right side
    13,708.13x = 140,375,231.01
  5. Step 5: Solve for x
    x = 140,375,231.01/13,708.13
  6. Step 6: Final answer
    x = 10,240.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.