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Finding the Fourth Proportional to 38,877, 53,654.99 and 21,887.61

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Solution

The fourth proportional to 38,877, 53,654.99 and 21,887.61 is: 30,207.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,877 : 53,654.99 = 21,887.61 : x
  2. Step 2: Convert to fraction form
    38,877/53,654.99 = 21,887.61/x
  3. Step 3: Cross multiply
    38,877x = 53,654.99 × 21,887.61
  4. Step 4: Simplify right side
    38,877x = 1,174,379,386.24
  5. Step 5: Solve for x
    x = 1,174,379,386.24/38,877
  6. Step 6: Final answer
    x = 30,207.56

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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.