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Finding the Fourth Proportional to 13,559.60, 20,323.00 and 6,982.20

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Solution

The fourth proportional to 13,559.60, 20,323.00 and 6,982.20 is: 10,464.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,559.60 : 20,323.00 = 6,982.20 : x
  2. Step 2: Convert to fraction form
    13,559.60/20,323.00 = 6,982.20/x
  3. Step 3: Cross multiply
    13,559.60x = 20,323.00 × 6,982.20
  4. Step 4: Simplify right side
    13,559.60x = 141,899,259.33
  5. Step 5: Solve for x
    x = 141,899,259.33/13,559.60
  6. Step 6: Final answer
    x = 10,464.85

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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.