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Finding the Fourth Proportional to 28,468.92, 39,287.12 and 15,893.67

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Solution

The fourth proportional to 28,468.92, 39,287.12 and 15,893.67 is: 21,933.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.92 : 39,287.12 = 15,893.67 : x
  2. Step 2: Convert to fraction form
    28,468.92/39,287.12 = 15,893.67/x
  3. Step 3: Cross multiply
    28,468.92x = 39,287.12 × 15,893.67
  4. Step 4: Simplify right side
    28,468.92x = 624,416,520.53
  5. Step 5: Solve for x
    x = 624,416,520.53/28,468.92
  6. Step 6: Final answer
    x = 21,933.27

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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.