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Finding the Fourth Proportional to 20,597.10, 30,890.79 and 8,903.94

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Solution

The fourth proportional to 20,597.10, 30,890.79 and 8,903.94 is: 13,353.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,597.10 : 30,890.79 = 8,903.94 : x
  2. Step 2: Convert to fraction form
    20,597.10/30,890.79 = 8,903.94/x
  3. Step 3: Cross multiply
    20,597.10x = 30,890.79 × 8,903.94
  4. Step 4: Simplify right side
    20,597.10x = 275,049,740.71
  5. Step 5: Solve for x
    x = 275,049,740.71/20,597.10
  6. Step 6: Final answer
    x = 13,353.81

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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.