Home / 13,136.66-18,128.24-7,168.33

Finding the Fourth Proportional to 13,136.66, 18,128.24 and 7,168.33

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Solution

The fourth proportional to 13,136.66, 18,128.24 and 7,168.33 is: 9,892.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.66 : 18,128.24 = 7,168.33 : x
  2. Step 2: Convert to fraction form
    13,136.66/18,128.24 = 7,168.33/x
  3. Step 3: Cross multiply
    13,136.66x = 18,128.24 × 7,168.33
  4. Step 4: Simplify right side
    13,136.66x = 129,949,170.80
  5. Step 5: Solve for x
    x = 129,949,170.80/13,136.66
  6. Step 6: Final answer
    x = 9,892.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.