Home / 13,708.30-18,917.45-7,420.68

Finding the Fourth Proportional to 13,708.30, 18,917.45 and 7,420.68

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Solution

The fourth proportional to 13,708.30, 18,917.45 and 7,420.68 is: 10,240.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.30 : 18,917.45 = 7,420.68 : x
  2. Step 2: Convert to fraction form
    13,708.30/18,917.45 = 7,420.68/x
  3. Step 3: Cross multiply
    13,708.30x = 18,917.45 × 7,420.68
  4. Step 4: Simplify right side
    13,708.30x = 140,380,342.87
  5. Step 5: Solve for x
    x = 140,380,342.87/13,708.30
  6. Step 6: Final answer
    x = 10,240.54

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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.