Home / 13,428.59-20,099.75-7,172.96

Finding the Fourth Proportional to 13,428.59, 20,099.75 and 7,172.96

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Solution

The fourth proportional to 13,428.59, 20,099.75 and 7,172.96 is: 10,736.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.59 : 20,099.75 = 7,172.96 : x
  2. Step 2: Convert to fraction form
    13,428.59/20,099.75 = 7,172.96/x
  3. Step 3: Cross multiply
    13,428.59x = 20,099.75 × 7,172.96
  4. Step 4: Simplify right side
    13,428.59x = 144,174,566.40
  5. Step 5: Solve for x
    x = 144,174,566.40/13,428.59
  6. Step 6: Final answer
    x = 10,736.39

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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.