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Finding the Fourth Proportional to 60,467.72, 90,709.79 and 21,019.73

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Solution

The fourth proportional to 60,467.72, 90,709.79 and 21,019.73 is: 31,532.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,467.72 : 90,709.79 = 21,019.73 : x
  2. Step 2: Convert to fraction form
    60,467.72/90,709.79 = 21,019.73/x
  3. Step 3: Cross multiply
    60,467.72x = 90,709.79 × 21,019.73
  4. Step 4: Simplify right side
    60,467.72x = 1,906,694,735.51
  5. Step 5: Solve for x
    x = 1,906,694,735.51/60,467.72
  6. Step 6: Final answer
    x = 31,532.44

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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.