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Finding the Fourth Proportional to 21,653.00, 29,880.91 and 12,221.96

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Solution

The fourth proportional to 21,653.00, 29,880.91 and 12,221.96 is: 16,866.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.00 : 29,880.91 = 12,221.96 : x
  2. Step 2: Convert to fraction form
    21,653.00/29,880.91 = 12,221.96/x
  3. Step 3: Cross multiply
    21,653.00x = 29,880.91 × 12,221.96
  4. Step 4: Simplify right side
    21,653.00x = 365,203,106.82
  5. Step 5: Solve for x
    x = 365,203,106.82/21,653.00
  6. Step 6: Final answer
    x = 16,866.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.