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Finding the Fourth Proportional to 28,331, 39,106.50 and 17,153

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Solution

The fourth proportional to 28,331, 39,106.50 and 17,153 is: 23,677.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,331 : 39,106.50 = 17,153 : x
  2. Step 2: Convert to fraction form
    28,331/39,106.50 = 17,153/x
  3. Step 3: Cross multiply
    28,331x = 39,106.50 × 17,153
  4. Step 4: Simplify right side
    28,331x = 670,793,794.50
  5. Step 5: Solve for x
    x = 670,793,794.50/28,331
  6. Step 6: Final answer
    x = 23,677.02

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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.