Home / 21,415.49-29,553.53-11,855.09

Finding the Fourth Proportional to 21,415.49, 29,553.53 and 11,855.09

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Solution

The fourth proportional to 21,415.49, 29,553.53 and 11,855.09 is: 16,360.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.49 : 29,553.53 = 11,855.09 : x
  2. Step 2: Convert to fraction form
    21,415.49/29,553.53 = 11,855.09/x
  3. Step 3: Cross multiply
    21,415.49x = 29,553.53 × 11,855.09
  4. Step 4: Simplify right side
    21,415.49x = 350,359,772.58
  5. Step 5: Solve for x
    x = 350,359,772.58/21,415.49
  6. Step 6: Final answer
    x = 16,360.11

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1.5x scale

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.