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Finding the Fourth Proportional to 21,331.44, 31,999.86 and 7,294.16

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Solution

The fourth proportional to 21,331.44, 31,999.86 and 7,294.16 is: 10,942.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.44 : 31,999.86 = 7,294.16 : x
  2. Step 2: Convert to fraction form
    21,331.44/31,999.86 = 7,294.16/x
  3. Step 3: Cross multiply
    21,331.44x = 31,999.86 × 7,294.16
  4. Step 4: Simplify right side
    21,331.44x = 233,412,098.82
  5. Step 5: Solve for x
    x = 233,412,098.82/21,331.44
  6. Step 6: Final answer
    x = 10,942.16

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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.