Home / 18,716.29-28,074.36-7,620.36

Finding the Fourth Proportional to 18,716.29, 28,074.36 and 7,620.36

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Solution

The fourth proportional to 18,716.29, 28,074.36 and 7,620.36 is: 11,430.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.29 : 28,074.36 = 7,620.36 : x
  2. Step 2: Convert to fraction form
    18,716.29/28,074.36 = 7,620.36/x
  3. Step 3: Cross multiply
    18,716.29x = 28,074.36 × 7,620.36
  4. Step 4: Simplify right side
    18,716.29x = 213,936,729.97
  5. Step 5: Solve for x
    x = 213,936,729.97/18,716.29
  6. Step 6: Final answer
    x = 11,430.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.