Home / 12,121.49-18,172.41-5,453.10

Finding the Fourth Proportional to 12,121.49, 18,172.41 and 5,453.10

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Solution

The fourth proportional to 12,121.49, 18,172.41 and 5,453.10 is: 8,175.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.49 : 18,172.41 = 5,453.10 : x
  2. Step 2: Convert to fraction form
    12,121.49/18,172.41 = 5,453.10/x
  3. Step 3: Cross multiply
    12,121.49x = 18,172.41 × 5,453.10
  4. Step 4: Simplify right side
    12,121.49x = 99,095,968.97
  5. Step 5: Solve for x
    x = 99,095,968.97/12,121.49
  6. Step 6: Final answer
    x = 8,175.23

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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.