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Finding the Fourth Proportional to 21,783.25, 30,060.89 and 11,847.25

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Solution

The fourth proportional to 21,783.25, 30,060.89 and 11,847.25 is: 16,349.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,783.25 : 30,060.89 = 11,847.25 : x
  2. Step 2: Convert to fraction form
    21,783.25/30,060.89 = 11,847.25/x
  3. Step 3: Cross multiply
    21,783.25x = 30,060.89 × 11,847.25
  4. Step 4: Simplify right side
    21,783.25x = 356,138,879.05
  5. Step 5: Solve for x
    x = 356,138,879.05/21,783.25
  6. Step 6: Final answer
    x = 16,349.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.