Home / 28,906.12-39,882.42-18,300.28

Finding the Fourth Proportional to 28,906.12, 39,882.42 and 18,300.28

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Solution

The fourth proportional to 28,906.12, 39,882.42 and 18,300.28 is: 25,249.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.12 : 39,882.42 = 18,300.28 : x
  2. Step 2: Convert to fraction form
    28,906.12/39,882.42 = 18,300.28/x
  3. Step 3: Cross multiply
    28,906.12x = 39,882.42 × 18,300.28
  4. Step 4: Simplify right side
    28,906.12x = 729,859,453.08
  5. Step 5: Solve for x
    x = 729,859,453.08/28,906.12
  6. Step 6: Final answer
    x = 25,249.31

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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.