Home / 13,561.54-20,340.20-5,245.40

Finding the Fourth Proportional to 13,561.54, 20,340.20 and 5,245.40

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Solution

The fourth proportional to 13,561.54, 20,340.20 and 5,245.40 is: 7,867.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,561.54 : 20,340.20 = 5,245.40 : x
  2. Step 2: Convert to fraction form
    13,561.54/20,340.20 = 5,245.40/x
  3. Step 3: Cross multiply
    13,561.54x = 20,340.20 × 5,245.40
  4. Step 4: Simplify right side
    13,561.54x = 106,692,485.08
  5. Step 5: Solve for x
    x = 106,692,485.08/13,561.54
  6. Step 6: Final answer
    x = 7,867.28

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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.