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Finding the Fourth Proportional to 20,575.62, 30,904.43 and 19,415.09

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Solution

The fourth proportional to 20,575.62, 30,904.43 and 19,415.09 is: 29,161.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.62 : 30,904.43 = 19,415.09 : x
  2. Step 2: Convert to fraction form
    20,575.62/30,904.43 = 19,415.09/x
  3. Step 3: Cross multiply
    20,575.62x = 30,904.43 × 19,415.09
  4. Step 4: Simplify right side
    20,575.62x = 600,012,164.05
  5. Step 5: Solve for x
    x = 600,012,164.05/20,575.62
  6. Step 6: Final answer
    x = 29,161.32

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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.