Home / 21,172.49-29,220.44-12,222.39

Finding the Fourth Proportional to 21,172.49, 29,220.44 and 12,222.39

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Solution

The fourth proportional to 21,172.49, 29,220.44 and 12,222.39 is: 16,868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.49 : 29,220.44 = 12,222.39 : x
  2. Step 2: Convert to fraction form
    21,172.49/29,220.44 = 12,222.39/x
  3. Step 3: Cross multiply
    21,172.49x = 29,220.44 × 12,222.39
  4. Step 4: Simplify right side
    21,172.49x = 357,143,552.54
  5. Step 5: Solve for x
    x = 357,143,552.54/21,172.49
  6. Step 6: Final answer
    x = 16,868.29

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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.