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Finding the Fourth Proportional to 38,809.48, 53,553.54 and 21,809.80

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Solution

The fourth proportional to 38,809.48, 53,553.54 and 21,809.80 is: 30,095.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,809.48 : 53,553.54 = 21,809.80 : x
  2. Step 2: Convert to fraction form
    38,809.48/53,553.54 = 21,809.80/x
  3. Step 3: Cross multiply
    38,809.48x = 53,553.54 × 21,809.80
  4. Step 4: Simplify right side
    38,809.48x = 1,167,991,996.69
  5. Step 5: Solve for x
    x = 1,167,991,996.69/38,809.48
  6. Step 6: Final answer
    x = 30,095.53

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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.