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Finding the Fourth Proportional to 20,602.20, 30,917.70 and 8,923.80

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Solution

The fourth proportional to 20,602.20, 30,917.70 and 8,923.80 is: 13,391.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.20 : 30,917.70 = 8,923.80 : x
  2. Step 2: Convert to fraction form
    20,602.20/30,917.70 = 8,923.80/x
  3. Step 3: Cross multiply
    20,602.20x = 30,917.70 × 8,923.80
  4. Step 4: Simplify right side
    20,602.20x = 275,903,371.26
  5. Step 5: Solve for x
    x = 275,903,371.26/20,602.20
  6. Step 6: Final answer
    x = 13,391.94

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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.