Home / 13,428.26-20,136.41-7,187.07

Finding the Fourth Proportional to 13,428.26, 20,136.41 and 7,187.07

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Solution

The fourth proportional to 13,428.26, 20,136.41 and 7,187.07 is: 10,777.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.26 : 20,136.41 = 7,187.07 : x
  2. Step 2: Convert to fraction form
    13,428.26/20,136.41 = 7,187.07/x
  3. Step 3: Cross multiply
    13,428.26x = 20,136.41 × 7,187.07
  4. Step 4: Simplify right side
    13,428.26x = 144,721,856.53
  5. Step 5: Solve for x
    x = 144,721,856.53/13,428.26
  6. Step 6: Final answer
    x = 10,777.41

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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.