Home / 13,120.80-19,668.60-4,351.20

Finding the Fourth Proportional to 13,120.80, 19,668.60 and 4,351.20

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Solution

The fourth proportional to 13,120.80, 19,668.60 and 4,351.20 is: 6,522.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.80 : 19,668.60 = 4,351.20 : x
  2. Step 2: Convert to fraction form
    13,120.80/19,668.60 = 4,351.20/x
  3. Step 3: Cross multiply
    13,120.80x = 19,668.60 × 4,351.20
  4. Step 4: Simplify right side
    13,120.80x = 85,582,012.32
  5. Step 5: Solve for x
    x = 85,582,012.32/13,120.80
  6. Step 6: Final answer
    x = 6,522.62

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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.