Home / 28,716.39-39,617.55-21,180.58

Finding the Fourth Proportional to 28,716.39, 39,617.55 and 21,180.58

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Solution

The fourth proportional to 28,716.39, 39,617.55 and 21,180.58 is: 29,221.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,716.39 : 39,617.55 = 21,180.58 : x
  2. Step 2: Convert to fraction form
    28,716.39/39,617.55 = 21,180.58/x
  3. Step 3: Cross multiply
    28,716.39x = 39,617.55 × 21,180.58
  4. Step 4: Simplify right side
    28,716.39x = 839,122,588.14
  5. Step 5: Solve for x
    x = 839,122,588.14/28,716.39
  6. Step 6: Final answer
    x = 29,221.03

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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.