Home / 13,427.81-20,136.91-5,105.61

Finding the Fourth Proportional to 13,427.81, 20,136.91 and 5,105.61

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Solution

The fourth proportional to 13,427.81, 20,136.91 and 5,105.61 is: 7,656.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.81 : 20,136.91 = 5,105.61 : x
  2. Step 2: Convert to fraction form
    13,427.81/20,136.91 = 5,105.61/x
  3. Step 3: Cross multiply
    13,427.81x = 20,136.91 × 5,105.61
  4. Step 4: Simplify right side
    13,427.81x = 102,811,209.07
  5. Step 5: Solve for x
    x = 102,811,209.07/13,427.81
  6. Step 6: Final answer
    x = 7,656.59

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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.