Home / 18,907.20-28,371.60-7,228.80

Finding the Fourth Proportional to 18,907.20, 28,371.60 and 7,228.80

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Solution

The fourth proportional to 18,907.20, 28,371.60 and 7,228.80 is: 10,847.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.20 : 28,371.60 = 7,228.80 : x
  2. Step 2: Convert to fraction form
    18,907.20/28,371.60 = 7,228.80/x
  3. Step 3: Cross multiply
    18,907.20x = 28,371.60 × 7,228.80
  4. Step 4: Simplify right side
    18,907.20x = 205,092,622.08
  5. Step 5: Solve for x
    x = 205,092,622.08/18,907.20
  6. Step 6: Final answer
    x = 10,847.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.