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Finding the Fourth Proportional to 28,190, 42,283.38 and 8,468.12

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Solution

The fourth proportional to 28,190, 42,283.38 and 8,468.12 is: 12,701.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190 : 42,283.38 = 8,468.12 : x
  2. Step 2: Convert to fraction form
    28,190/42,283.38 = 8,468.12/x
  3. Step 3: Cross multiply
    28,190x = 42,283.38 × 8,468.12
  4. Step 4: Simplify right side
    28,190x = 358,060,735.85
  5. Step 5: Solve for x
    x = 358,060,735.85/28,190
  6. Step 6: Final answer
    x = 12,701.69

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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.