Home / 13,245.45-18,278.78-7,940.27

Finding the Fourth Proportional to 13,245.45, 18,278.78 and 7,940.27

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Solution

The fourth proportional to 13,245.45, 18,278.78 and 7,940.27 is: 10,957.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.45 : 18,278.78 = 7,940.27 : x
  2. Step 2: Convert to fraction form
    13,245.45/18,278.78 = 7,940.27/x
  3. Step 3: Cross multiply
    13,245.45x = 18,278.78 × 7,940.27
  4. Step 4: Simplify right side
    13,245.45x = 145,138,448.47
  5. Step 5: Solve for x
    x = 145,138,448.47/13,245.45
  6. Step 6: Final answer
    x = 10,957.61

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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.