Home / 13,620.52-20,425.20-4,257.40

Finding the Fourth Proportional to 13,620.52, 20,425.20 and 4,257.40

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Solution

The fourth proportional to 13,620.52, 20,425.20 and 4,257.40 is: 6,384.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.52 : 20,425.20 = 4,257.40 : x
  2. Step 2: Convert to fraction form
    13,620.52/20,425.20 = 4,257.40/x
  3. Step 3: Cross multiply
    13,620.52x = 20,425.20 × 4,257.40
  4. Step 4: Simplify right side
    13,620.52x = 86,958,246.48
  5. Step 5: Solve for x
    x = 86,958,246.48/13,620.52
  6. Step 6: Final answer
    x = 6,384.36

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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.