Home / 13,423.40-20,120.70-5,100.20

Finding the Fourth Proportional to 13,423.40, 20,120.70 and 5,100.20

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Solution

The fourth proportional to 13,423.40, 20,120.70 and 5,100.20 is: 7,644.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.40 : 20,120.70 = 5,100.20 : x
  2. Step 2: Convert to fraction form
    13,423.40/20,120.70 = 5,100.20/x
  3. Step 3: Cross multiply
    13,423.40x = 20,120.70 × 5,100.20
  4. Step 4: Simplify right side
    13,423.40x = 102,619,594.14
  5. Step 5: Solve for x
    x = 102,619,594.14/13,423.40
  6. Step 6: Final answer
    x = 7,644.83

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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.