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Finding the Fourth Proportional to 21,195.63, 31,796.96 and 7,156.98

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Solution

The fourth proportional to 21,195.63, 31,796.96 and 7,156.98 is: 10,736.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.63 : 31,796.96 = 7,156.98 : x
  2. Step 2: Convert to fraction form
    21,195.63/31,796.96 = 7,156.98/x
  3. Step 3: Cross multiply
    21,195.63x = 31,796.96 × 7,156.98
  4. Step 4: Simplify right side
    21,195.63x = 227,570,171.00
  5. Step 5: Solve for x
    x = 227,570,171.00/21,195.63
  6. Step 6: Final answer
    x = 10,736.66

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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.