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Finding the Fourth Proportional to 13,935, 20,890.19 and 10,662.69

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Solution

The fourth proportional to 13,935, 20,890.19 and 10,662.69 is: 15,984.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935 : 20,890.19 = 10,662.69 : x
  2. Step 2: Convert to fraction form
    13,935/20,890.19 = 10,662.69/x
  3. Step 3: Cross multiply
    13,935x = 20,890.19 × 10,662.69
  4. Step 4: Simplify right side
    13,935x = 222,745,566.70
  5. Step 5: Solve for x
    x = 222,745,566.70/13,935
  6. Step 6: Final answer
    x = 15,984.61

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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.