Home / 13,728.81-18,945.75-7,441.18

Finding the Fourth Proportional to 13,728.81, 18,945.75 and 7,441.18

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Solution

The fourth proportional to 13,728.81, 18,945.75 and 7,441.18 is: 10,268.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.81 : 18,945.75 = 7,441.18 : x
  2. Step 2: Convert to fraction form
    13,728.81/18,945.75 = 7,441.18/x
  3. Step 3: Cross multiply
    13,728.81x = 18,945.75 × 7,441.18
  4. Step 4: Simplify right side
    13,728.81x = 140,978,735.99
  5. Step 5: Solve for x
    x = 140,978,735.99/13,728.81
  6. Step 6: Final answer
    x = 10,268.82

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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.