Home / 28,910.82-39,903.59-18,821.69

Finding the Fourth Proportional to 28,910.82, 39,903.59 and 18,821.69

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Solution

The fourth proportional to 28,910.82, 39,903.59 and 18,821.69 is: 25,978.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.82 : 39,903.59 = 18,821.69 : x
  2. Step 2: Convert to fraction form
    28,910.82/39,903.59 = 18,821.69/x
  3. Step 3: Cross multiply
    28,910.82x = 39,903.59 × 18,821.69
  4. Step 4: Simplify right side
    28,910.82x = 751,053,000.87
  5. Step 5: Solve for x
    x = 751,053,000.87/28,910.82
  6. Step 6: Final answer
    x = 25,978.27

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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.