Home / 21,906.72-30,232.44-12,478.32

Finding the Fourth Proportional to 21,906.72, 30,232.44 and 12,478.32

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Solution

The fourth proportional to 21,906.72, 30,232.44 and 12,478.32 is: 17,220.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.72 : 30,232.44 = 12,478.32 : x
  2. Step 2: Convert to fraction form
    21,906.72/30,232.44 = 12,478.32/x
  3. Step 3: Cross multiply
    21,906.72x = 30,232.44 × 12,478.32
  4. Step 4: Simplify right side
    21,906.72x = 377,250,060.70
  5. Step 5: Solve for x
    x = 377,250,060.70/21,906.72
  6. Step 6: Final answer
    x = 17,220.75

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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.