Home / 19,836.80-29,719.20-9,425.60

Finding the Fourth Proportional to 19,836.80, 29,719.20 and 9,425.60

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Solution

The fourth proportional to 19,836.80, 29,719.20 and 9,425.60 is: 14,121.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,836.80 : 29,719.20 = 9,425.60 : x
  2. Step 2: Convert to fraction form
    19,836.80/29,719.20 = 9,425.60/x
  3. Step 3: Cross multiply
    19,836.80x = 29,719.20 × 9,425.60
  4. Step 4: Simplify right side
    19,836.80x = 280,121,291.52
  5. Step 5: Solve for x
    x = 280,121,291.52/19,836.80
  6. Step 6: Final answer
    x = 14,121.29

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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.