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Finding the Fourth Proportional to 21,483.37, 29,640.96 and 13,930

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Solution

The fourth proportional to 21,483.37, 29,640.96 and 13,930 is: 19,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,483.37 : 29,640.96 = 13,930 : x
  2. Step 2: Convert to fraction form
    21,483.37/29,640.96 = 13,930/x
  3. Step 3: Cross multiply
    21,483.37x = 29,640.96 × 13,930
  4. Step 4: Simplify right side
    21,483.37x = 412,898,572.80
  5. Step 5: Solve for x
    x = 412,898,572.80/21,483.37
  6. Step 6: Final answer
    x = 19,219.45

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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.