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Finding the Fourth Proportional to 38,888, 53,665.44 and 21,224

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Solution

The fourth proportional to 38,888, 53,665.44 and 21,224 is: 29,289.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,888 : 53,665.44 = 21,224 : x
  2. Step 2: Convert to fraction form
    38,888/53,665.44 = 21,224/x
  3. Step 3: Cross multiply
    38,888x = 53,665.44 × 21,224
  4. Step 4: Simplify right side
    38,888x = 1,138,995,298.56
  5. Step 5: Solve for x
    x = 1,138,995,298.56/38,888
  6. Step 6: Final answer
    x = 29,289.12

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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.