Home / 19,128.80-28,693.20-7,450.22

Finding the Fourth Proportional to 19,128.80, 28,693.20 and 7,450.22

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Solution

The fourth proportional to 19,128.80, 28,693.20 and 7,450.22 is: 11,175.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.80 : 28,693.20 = 7,450.22 : x
  2. Step 2: Convert to fraction form
    19,128.80/28,693.20 = 7,450.22/x
  3. Step 3: Cross multiply
    19,128.80x = 28,693.20 × 7,450.22
  4. Step 4: Simplify right side
    19,128.80x = 213,770,652.50
  5. Step 5: Solve for x
    x = 213,770,652.50/19,128.80
  6. Step 6: Final answer
    x = 11,175.33

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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.