Home / 21,018.48-29,009.79-12,072.03

Finding the Fourth Proportional to 21,018.48, 29,009.79 and 12,072.03

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Solution

The fourth proportional to 21,018.48, 29,009.79 and 12,072.03 is: 16,661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.48 : 29,009.79 = 12,072.03 : x
  2. Step 2: Convert to fraction form
    21,018.48/29,009.79 = 12,072.03/x
  3. Step 3: Cross multiply
    21,018.48x = 29,009.79 × 12,072.03
  4. Step 4: Simplify right side
    21,018.48x = 350,207,055.17
  5. Step 5: Solve for x
    x = 350,207,055.17/21,018.48
  6. Step 6: Final answer
    x = 16,661.86

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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.