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Finding the Fourth Proportional to 28,404.76, 39,167.80 and 19,336

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Solution

The fourth proportional to 28,404.76, 39,167.80 and 19,336 is: 26,662.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.76 : 39,167.80 = 19,336 : x
  2. Step 2: Convert to fraction form
    28,404.76/39,167.80 = 19,336/x
  3. Step 3: Cross multiply
    28,404.76x = 39,167.80 × 19,336
  4. Step 4: Simplify right side
    28,404.76x = 757,348,580.80
  5. Step 5: Solve for x
    x = 757,348,580.80/28,404.76
  6. Step 6: Final answer
    x = 26,662.73

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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.