Home / 13,742.69-20,600.21-5,428.60

Finding the Fourth Proportional to 13,742.69, 20,600.21 and 5,428.60

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Solution

The fourth proportional to 13,742.69, 20,600.21 and 5,428.60 is: 8,137.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.69 : 20,600.21 = 5,428.60 : x
  2. Step 2: Convert to fraction form
    13,742.69/20,600.21 = 5,428.60/x
  3. Step 3: Cross multiply
    13,742.69x = 20,600.21 × 5,428.60
  4. Step 4: Simplify right side
    13,742.69x = 111,830,262.08
  5. Step 5: Solve for x
    x = 111,830,262.08/13,742.69
  6. Step 6: Final answer
    x = 8,137.44

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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.