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Finding the Fourth Proportional to 28,055, 38,716.44 and 15,479.48

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Solution

The fourth proportional to 28,055, 38,716.44 and 15,479.48 is: 21,361.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,055 : 38,716.44 = 15,479.48 : x
  2. Step 2: Convert to fraction form
    28,055/38,716.44 = 15,479.48/x
  3. Step 3: Cross multiply
    28,055x = 38,716.44 × 15,479.48
  4. Step 4: Simplify right side
    28,055x = 599,310,358.65
  5. Step 5: Solve for x
    x = 599,310,358.65/28,055
  6. Step 6: Final answer
    x = 21,361.98

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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.