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Finding the Fourth Proportional to 40,920.62, 61,363.03 and 20,644.90

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Solution

The fourth proportional to 40,920.62, 61,363.03 and 20,644.90 is: 30,958.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,920.62 : 61,363.03 = 20,644.90 : x
  2. Step 2: Convert to fraction form
    40,920.62/61,363.03 = 20,644.90/x
  3. Step 3: Cross multiply
    40,920.62x = 61,363.03 × 20,644.90
  4. Step 4: Simplify right side
    40,920.62x = 1,266,833,490.45
  5. Step 5: Solve for x
    x = 1,266,833,490.45/40,920.62
  6. Step 6: Final answer
    x = 30,958.32

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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.