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Finding the Fourth Proportional to 20,487.70, 30,740.73 and 9,951.94

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Solution

The fourth proportional to 20,487.70, 30,740.73 and 9,951.94 is: 14,932.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.70 : 30,740.73 = 9,951.94 : x
  2. Step 2: Convert to fraction form
    20,487.70/30,740.73 = 9,951.94/x
  3. Step 3: Cross multiply
    20,487.70x = 30,740.73 × 9,951.94
  4. Step 4: Simplify right side
    20,487.70x = 305,929,900.52
  5. Step 5: Solve for x
    x = 305,929,900.52/20,487.70
  6. Step 6: Final answer
    x = 14,932.37

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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.