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Finding the Fourth Proportional to 28,674.62, 39,569.60 and 15,928.62

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Solution

The fourth proportional to 28,674.62, 39,569.60 and 15,928.62 is: 21,980.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,674.62 : 39,569.60 = 15,928.62 : x
  2. Step 2: Convert to fraction form
    28,674.62/39,569.60 = 15,928.62/x
  3. Step 3: Cross multiply
    28,674.62x = 39,569.60 × 15,928.62
  4. Step 4: Simplify right side
    28,674.62x = 630,289,121.95
  5. Step 5: Solve for x
    x = 630,289,121.95/28,674.62
  6. Step 6: Final answer
    x = 21,980.73

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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.