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Finding the Fourth Proportional to 21,866.10, 32,790.96 and 7,071.06

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Solution

The fourth proportional to 21,866.10, 32,790.96 and 7,071.06 is: 10,603.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.10 : 32,790.96 = 7,071.06 : x
  2. Step 2: Convert to fraction form
    21,866.10/32,790.96 = 7,071.06/x
  3. Step 3: Cross multiply
    21,866.10x = 32,790.96 × 7,071.06
  4. Step 4: Simplify right side
    21,866.10x = 231,866,845.62
  5. Step 5: Solve for x
    x = 231,866,845.62/21,866.10
  6. Step 6: Final answer
    x = 10,603.94

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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.