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Finding the Fourth Proportional to 39,609.56, 54,658.82 and 21,701

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Solution

The fourth proportional to 39,609.56, 54,658.82 and 21,701 is: 29,946.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,609.56 : 54,658.82 = 21,701 : x
  2. Step 2: Convert to fraction form
    39,609.56/54,658.82 = 21,701/x
  3. Step 3: Cross multiply
    39,609.56x = 54,658.82 × 21,701
  4. Step 4: Simplify right side
    39,609.56x = 1,186,151,052.82
  5. Step 5: Solve for x
    x = 1,186,151,052.82/39,609.56
  6. Step 6: Final answer
    x = 29,946.08

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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.