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Finding the Fourth Proportional to 28,676.90, 42,946.14 and 17,245.96

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Solution

The fourth proportional to 28,676.90, 42,946.14 and 17,245.96 is: 25,827.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,676.90 : 42,946.14 = 17,245.96 : x
  2. Step 2: Convert to fraction form
    28,676.90/42,946.14 = 17,245.96/x
  3. Step 3: Cross multiply
    28,676.90x = 42,946.14 × 17,245.96
  4. Step 4: Simplify right side
    28,676.90x = 740,647,251.55
  5. Step 5: Solve for x
    x = 740,647,251.55/28,676.90
  6. Step 6: Final answer
    x = 25,827.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.