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Finding the Fourth Proportional to 39,308, 54,245.04 and 21,644

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Solution

The fourth proportional to 39,308, 54,245.04 and 21,644 is: 29,868.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,308 : 54,245.04 = 21,644 : x
  2. Step 2: Convert to fraction form
    39,308/54,245.04 = 21,644/x
  3. Step 3: Cross multiply
    39,308x = 54,245.04 × 21,644
  4. Step 4: Simplify right side
    39,308x = 1,174,079,645.76
  5. Step 5: Solve for x
    x = 1,174,079,645.76/39,308
  6. Step 6: Final answer
    x = 29,868.72

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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.