Home / 13,708.22-18,917.34-7,420.59

Finding the Fourth Proportional to 13,708.22, 18,917.34 and 7,420.59

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Solution

The fourth proportional to 13,708.22, 18,917.34 and 7,420.59 is: 10,240.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.22 : 18,917.34 = 7,420.59 : x
  2. Step 2: Convert to fraction form
    13,708.22/18,917.34 = 7,420.59/x
  3. Step 3: Cross multiply
    13,708.22x = 18,917.34 × 7,420.59
  4. Step 4: Simplify right side
    13,708.22x = 140,377,824.03
  5. Step 5: Solve for x
    x = 140,377,824.03/13,708.22
  6. Step 6: Final answer
    x = 10,240.42

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1.5x scale

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.