Home / 21,300.92-29,388.30-12,914.36

Finding the Fourth Proportional to 21,300.92, 29,388.30 and 12,914.36

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Solution

The fourth proportional to 21,300.92, 29,388.30 and 12,914.36 is: 17,817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,300.92 : 29,388.30 = 12,914.36 : x
  2. Step 2: Convert to fraction form
    21,300.92/29,388.30 = 12,914.36/x
  3. Step 3: Cross multiply
    21,300.92x = 29,388.30 × 12,914.36
  4. Step 4: Simplify right side
    21,300.92x = 379,531,085.99
  5. Step 5: Solve for x
    x = 379,531,085.99/21,300.92
  6. Step 6: Final answer
    x = 17,817.59

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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.