Home / 13,420.60-20,137.82-5,528.95

Finding the Fourth Proportional to 13,420.60, 20,137.82 and 5,528.95

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Solution

The fourth proportional to 13,420.60, 20,137.82 and 5,528.95 is: 8,296.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.60 : 20,137.82 = 5,528.95 : x
  2. Step 2: Convert to fraction form
    13,420.60/20,137.82 = 5,528.95/x
  3. Step 3: Cross multiply
    13,420.60x = 20,137.82 × 5,528.95
  4. Step 4: Simplify right side
    13,420.60x = 111,340,999.89
  5. Step 5: Solve for x
    x = 111,340,999.89/13,420.60
  6. Step 6: Final answer
    x = 8,296.28

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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.