Home / 18,880.62-28,324.31-7,781.25

Finding the Fourth Proportional to 18,880.62, 28,324.31 and 7,781.25

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Solution

The fourth proportional to 18,880.62, 28,324.31 and 7,781.25 is: 11,673.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880.62 : 28,324.31 = 7,781.25 : x
  2. Step 2: Convert to fraction form
    18,880.62/28,324.31 = 7,781.25/x
  3. Step 3: Cross multiply
    18,880.62x = 28,324.31 × 7,781.25
  4. Step 4: Simplify right side
    18,880.62x = 220,398,498.28
  5. Step 5: Solve for x
    x = 220,398,498.28/18,880.62
  6. Step 6: Final answer
    x = 11,673.27

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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.