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Finding the Fourth Proportional to 28,813.92, 43,188.76 and 12,168.96

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Solution

The fourth proportional to 28,813.92, 43,188.76 and 12,168.96 is: 18,239.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,813.92 : 43,188.76 = 12,168.96 : x
  2. Step 2: Convert to fraction form
    28,813.92/43,188.76 = 12,168.96/x
  3. Step 3: Cross multiply
    28,813.92x = 43,188.76 × 12,168.96
  4. Step 4: Simplify right side
    28,813.92x = 525,562,292.89
  5. Step 5: Solve for x
    x = 525,562,292.89/28,813.92
  6. Step 6: Final answer
    x = 18,239.87

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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.