Home / 13,728.46-18,945.24-7,440.85

Finding the Fourth Proportional to 13,728.46, 18,945.24 and 7,440.85

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Solution

The fourth proportional to 13,728.46, 18,945.24 and 7,440.85 is: 10,268.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.46 : 18,945.24 = 7,440.85 : x
  2. Step 2: Convert to fraction form
    13,728.46/18,945.24 = 7,440.85/x
  3. Step 3: Cross multiply
    13,728.46x = 18,945.24 × 7,440.85
  4. Step 4: Simplify right side
    13,728.46x = 140,968,689.05
  5. Step 5: Solve for x
    x = 140,968,689.05/13,728.46
  6. Step 6: Final answer
    x = 10,268.35

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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.