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Finding the Fourth Proportional to 21,558, 29,751.75 and 12,127.26

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Solution

The fourth proportional to 21,558, 29,751.75 and 12,127.26 is: 16,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558 : 29,751.75 = 12,127.26 : x
  2. Step 2: Convert to fraction form
    21,558/29,751.75 = 12,127.26/x
  3. Step 3: Cross multiply
    21,558x = 29,751.75 × 12,127.26
  4. Step 4: Simplify right side
    21,558x = 360,807,207.71
  5. Step 5: Solve for x
    x = 360,807,207.71/21,558
  6. Step 6: Final answer
    x = 16,736.58

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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.