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Finding the Fourth Proportional to 21,409.98, 29,545.81 and 11,850.51

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Solution

The fourth proportional to 21,409.98, 29,545.81 and 11,850.51 is: 16,353.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.98 : 29,545.81 = 11,850.51 : x
  2. Step 2: Convert to fraction form
    21,409.98/29,545.81 = 11,850.51/x
  3. Step 3: Cross multiply
    21,409.98x = 29,545.81 × 11,850.51
  4. Step 4: Simplify right side
    21,409.98x = 350,132,916.86
  5. Step 5: Solve for x
    x = 350,132,916.86/21,409.98
  6. Step 6: Final answer
    x = 16,353.72

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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.