Home / 13,728.88-18,945.80-7,441.26

Finding the Fourth Proportional to 13,728.88, 18,945.80 and 7,441.26

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Solution

The fourth proportional to 13,728.88, 18,945.80 and 7,441.26 is: 10,268.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.88 : 18,945.80 = 7,441.26 : x
  2. Step 2: Convert to fraction form
    13,728.88/18,945.80 = 7,441.26/x
  3. Step 3: Cross multiply
    13,728.88x = 18,945.80 × 7,441.26
  4. Step 4: Simplify right side
    13,728.88x = 140,980,491.77
  5. Step 5: Solve for x
    x = 140,980,491.77/13,728.88
  6. Step 6: Final answer
    x = 10,268.90

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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.