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Finding the Fourth Proportional to 22,405.80, 33,608.70 and 20,947.80

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Solution

The fourth proportional to 22,405.80, 33,608.70 and 20,947.80 is: 31,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,405.80 : 33,608.70 = 20,947.80 : x
  2. Step 2: Convert to fraction form
    22,405.80/33,608.70 = 20,947.80/x
  3. Step 3: Cross multiply
    22,405.80x = 33,608.70 × 20,947.80
  4. Step 4: Simplify right side
    22,405.80x = 704,028,325.86
  5. Step 5: Solve for x
    x = 704,028,325.86/22,405.80
  6. Step 6: Final answer
    x = 31,421.70

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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.