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Finding the Fourth Proportional to 13,815.59, 20,739.49 and 6,801.39

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Solution

The fourth proportional to 13,815.59, 20,739.49 and 6,801.39 is: 10,210.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.59 : 20,739.49 = 6,801.39 : x
  2. Step 2: Convert to fraction form
    13,815.59/20,739.49 = 6,801.39/x
  3. Step 3: Cross multiply
    13,815.59x = 20,739.49 × 6,801.39
  4. Step 4: Simplify right side
    13,815.59x = 141,057,342.89
  5. Step 5: Solve for x
    x = 141,057,342.89/13,815.59
  6. Step 6: Final answer
    x = 10,210.02

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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.