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Finding the Fourth Proportional to 13,986.92, 20,980.11 and 5,666.60

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Solution

The fourth proportional to 13,986.92, 20,980.11 and 5,666.60 is: 8,499.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.92 : 20,980.11 = 5,666.60 : x
  2. Step 2: Convert to fraction form
    13,986.92/20,980.11 = 5,666.60/x
  3. Step 3: Cross multiply
    13,986.92x = 20,980.11 × 5,666.60
  4. Step 4: Simplify right side
    13,986.92x = 118,885,891.33
  5. Step 5: Solve for x
    x = 118,885,891.33/13,986.92
  6. Step 6: Final answer
    x = 8,499.79

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1.5x scale

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.