Home / 30,131.28-45,067.76-21,716.80

Finding the Fourth Proportional to 30,131.28, 45,067.76 and 21,716.80

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Solution

The fourth proportional to 30,131.28, 45,067.76 and 21,716.80 is: 32,482.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,131.28 : 45,067.76 = 21,716.80 : x
  2. Step 2: Convert to fraction form
    30,131.28/45,067.76 = 21,716.80/x
  3. Step 3: Cross multiply
    30,131.28x = 45,067.76 × 21,716.80
  4. Step 4: Simplify right side
    30,131.28x = 978,727,530.37
  5. Step 5: Solve for x
    x = 978,727,530.37/30,131.28
  6. Step 6: Final answer
    x = 32,482.11

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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.