Home / 21,981.96-32,971.32-7,190.64

Finding the Fourth Proportional to 21,981.96, 32,971.32 and 7,190.64

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Solution

The fourth proportional to 21,981.96, 32,971.32 and 7,190.64 is: 10,785.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.96 : 32,971.32 = 7,190.64 : x
  2. Step 2: Convert to fraction form
    21,981.96/32,971.32 = 7,190.64/x
  3. Step 3: Cross multiply
    21,981.96x = 32,971.32 × 7,190.64
  4. Step 4: Simplify right side
    21,981.96x = 237,084,892.44
  5. Step 5: Solve for x
    x = 237,084,892.44/21,981.96
  6. Step 6: Final answer
    x = 10,785.43

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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.