Home / 13,420.50-20,133.63-5,212.50

Finding the Fourth Proportional to 13,420.50, 20,133.63 and 5,212.50

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Solution

The fourth proportional to 13,420.50, 20,133.63 and 5,212.50 is: 7,819.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.50 : 20,133.63 = 5,212.50 : x
  2. Step 2: Convert to fraction form
    13,420.50/20,133.63 = 5,212.50/x
  3. Step 3: Cross multiply
    13,420.50x = 20,133.63 × 5,212.50
  4. Step 4: Simplify right side
    13,420.50x = 104,946,546.38
  5. Step 5: Solve for x
    x = 104,946,546.38/13,420.50
  6. Step 6: Final answer
    x = 7,819.87

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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.