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Finding the Fourth Proportional to 25,805.41, 38,533.41 and 20,480.70

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Solution

The fourth proportional to 25,805.41, 38,533.41 and 20,480.70 is: 30,582.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,805.41 : 38,533.41 = 20,480.70 : x
  2. Step 2: Convert to fraction form
    25,805.41/38,533.41 = 20,480.70/x
  3. Step 3: Cross multiply
    25,805.41x = 38,533.41 × 20,480.70
  4. Step 4: Simplify right side
    25,805.41x = 789,191,107.78
  5. Step 5: Solve for x
    x = 789,191,107.78/25,805.41
  6. Step 6: Final answer
    x = 30,582.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.