Home / 21,981.20-32,964.38-7,186.64

Finding the Fourth Proportional to 21,981.20, 32,964.38 and 7,186.64

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Solution

The fourth proportional to 21,981.20, 32,964.38 and 7,186.64 is: 10,777.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.20 : 32,964.38 = 7,186.64 : x
  2. Step 2: Convert to fraction form
    21,981.20/32,964.38 = 7,186.64/x
  3. Step 3: Cross multiply
    21,981.20x = 32,964.38 × 7,186.64
  4. Step 4: Simplify right side
    21,981.20x = 236,903,131.88
  5. Step 5: Solve for x
    x = 236,903,131.88/21,981.20
  6. Step 6: Final answer
    x = 10,777.53

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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.