Home / 21,072.89-29,081.43-12,120.39

Finding the Fourth Proportional to 21,072.89, 29,081.43 and 12,120.39

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Solution

The fourth proportional to 21,072.89, 29,081.43 and 12,120.39 is: 16,726.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.89 : 29,081.43 = 12,120.39 : x
  2. Step 2: Convert to fraction form
    21,072.89/29,081.43 = 12,120.39/x
  3. Step 3: Cross multiply
    21,072.89x = 29,081.43 × 12,120.39
  4. Step 4: Simplify right side
    21,072.89x = 352,478,273.36
  5. Step 5: Solve for x
    x = 352,478,273.36/21,072.89
  6. Step 6: Final answer
    x = 16,726.63

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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.