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Finding the Fourth Proportional to 13,756.67, 20,662.61 and 13,369.08

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Solution

The fourth proportional to 13,756.67, 20,662.61 and 13,369.08 is: 20,080.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.67 : 20,662.61 = 13,369.08 : x
  2. Step 2: Convert to fraction form
    13,756.67/20,662.61 = 13,369.08/x
  3. Step 3: Cross multiply
    13,756.67x = 20,662.61 × 13,369.08
  4. Step 4: Simplify right side
    13,756.67x = 276,240,019.25
  5. Step 5: Solve for x
    x = 276,240,019.25/13,756.67
  6. Step 6: Final answer
    x = 20,080.45

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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.