Home / 21,916.89-30,243.47-13,415.36

Finding the Fourth Proportional to 21,916.89, 30,243.47 and 13,415.36

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Solution

The fourth proportional to 21,916.89, 30,243.47 and 13,415.36 is: 18,512.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.89 : 30,243.47 = 13,415.36 : x
  2. Step 2: Convert to fraction form
    21,916.89/30,243.47 = 13,415.36/x
  3. Step 3: Cross multiply
    21,916.89x = 30,243.47 × 13,415.36
  4. Step 4: Simplify right side
    21,916.89x = 405,726,819.41
  5. Step 5: Solve for x
    x = 405,726,819.41/21,916.89
  6. Step 6: Final answer
    x = 18,512.06

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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.