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Finding the Fourth Proportional to 28,812.87, 39,745.76 and 16,873.88

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Solution

The fourth proportional to 28,812.87, 39,745.76 and 16,873.88 is: 23,276.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812.87 : 39,745.76 = 16,873.88 : x
  2. Step 2: Convert to fraction form
    28,812.87/39,745.76 = 16,873.88/x
  3. Step 3: Cross multiply
    28,812.87x = 39,745.76 × 16,873.88
  4. Step 4: Simplify right side
    28,812.87x = 670,664,901.65
  5. Step 5: Solve for x
    x = 670,664,901.65/28,812.87
  6. Step 6: Final answer
    x = 23,276.57

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1.5x scale

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.