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Finding the Fourth Proportional to 22,661.80, 33,992.70 and 20,912.20

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Solution

The fourth proportional to 22,661.80, 33,992.70 and 20,912.20 is: 31,368.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,661.80 : 33,992.70 = 20,912.20 : x
  2. Step 2: Convert to fraction form
    22,661.80/33,992.70 = 20,912.20/x
  3. Step 3: Cross multiply
    22,661.80x = 33,992.70 × 20,912.20
  4. Step 4: Simplify right side
    22,661.80x = 710,862,140.94
  5. Step 5: Solve for x
    x = 710,862,140.94/22,661.80
  6. Step 6: Final answer
    x = 31,368.30

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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.