Home / 28,192.85-38,906.14-15,620.03

Finding the Fourth Proportional to 28,192.85, 38,906.14 and 15,620.03

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Solution

The fourth proportional to 28,192.85, 38,906.14 and 15,620.03 is: 21,555.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,192.85 : 38,906.14 = 15,620.03 : x
  2. Step 2: Convert to fraction form
    28,192.85/38,906.14 = 15,620.03/x
  3. Step 3: Cross multiply
    28,192.85x = 38,906.14 × 15,620.03
  4. Step 4: Simplify right side
    28,192.85x = 607,715,059.12
  5. Step 5: Solve for x
    x = 607,715,059.12/28,192.85
  6. Step 6: Final answer
    x = 21,555.64

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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.