Home / 13,728.09-18,944.88-7,440.47

Finding the Fourth Proportional to 13,728.09, 18,944.88 and 7,440.47

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Solution

The fourth proportional to 13,728.09, 18,944.88 and 7,440.47 is: 10,267.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.09 : 18,944.88 = 7,440.47 : x
  2. Step 2: Convert to fraction form
    13,728.09/18,944.88 = 7,440.47/x
  3. Step 3: Cross multiply
    13,728.09x = 18,944.88 × 7,440.47
  4. Step 4: Simplify right side
    13,728.09x = 140,958,811.29
  5. Step 5: Solve for x
    x = 140,958,811.29/13,728.09
  6. Step 6: Final answer
    x = 10,267.91

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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.