Home / 18,772.49-28,161.81-7,676.19

Finding the Fourth Proportional to 18,772.49, 28,161.81 and 7,676.19

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Solution

The fourth proportional to 18,772.49, 28,161.81 and 7,676.19 is: 11,515.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.49 : 28,161.81 = 7,676.19 : x
  2. Step 2: Convert to fraction form
    18,772.49/28,161.81 = 7,676.19/x
  3. Step 3: Cross multiply
    18,772.49x = 28,161.81 × 7,676.19
  4. Step 4: Simplify right side
    18,772.49x = 216,175,404.30
  5. Step 5: Solve for x
    x = 216,175,404.30/18,772.49
  6. Step 6: Final answer
    x = 11,515.54

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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.