Home / 13,136.23-18,128.39-7,471.79

Finding the Fourth Proportional to 13,136.23, 18,128.39 and 7,471.79

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Solution

The fourth proportional to 13,136.23, 18,128.39 and 7,471.79 is: 10,311.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.23 : 18,128.39 = 7,471.79 : x
  2. Step 2: Convert to fraction form
    13,136.23/18,128.39 = 7,471.79/x
  3. Step 3: Cross multiply
    13,136.23x = 18,128.39 × 7,471.79
  4. Step 4: Simplify right side
    13,136.23x = 135,451,581.26
  5. Step 5: Solve for x
    x = 135,451,581.26/13,136.23
  6. Step 6: Final answer
    x = 10,311.30

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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.