Home / 13,728.48-18,945.26-7,440.87

Finding the Fourth Proportional to 13,728.48, 18,945.26 and 7,440.87

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Solution

The fourth proportional to 13,728.48, 18,945.26 and 7,440.87 is: 10,268.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.48 : 18,945.26 = 7,440.87 : x
  2. Step 2: Convert to fraction form
    13,728.48/18,945.26 = 7,440.87/x
  3. Step 3: Cross multiply
    13,728.48x = 18,945.26 × 7,440.87
  4. Step 4: Simplify right side
    13,728.48x = 140,969,179.57
  5. Step 5: Solve for x
    x = 140,969,179.57/13,728.48
  6. Step 6: Final answer
    x = 10,268.37

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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.