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Finding the Fourth Proportional to 38,675.56, 53,373.36 and 21,908.56

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Solution

The fourth proportional to 38,675.56, 53,373.36 and 21,908.56 is: 30,234.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,675.56 : 53,373.36 = 21,908.56 : x
  2. Step 2: Convert to fraction form
    38,675.56/53,373.36 = 21,908.56/x
  3. Step 3: Cross multiply
    38,675.56x = 53,373.36 × 21,908.56
  4. Step 4: Simplify right side
    38,675.56x = 1,169,333,459.96
  5. Step 5: Solve for x
    x = 1,169,333,459.96/38,675.56
  6. Step 6: Final answer
    x = 30,234.43

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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.