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Finding the Fourth Proportional to 28,745.80, 43,118.70 and 12,124.60

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Solution

The fourth proportional to 28,745.80, 43,118.70 and 12,124.60 is: 18,186.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,745.80 : 43,118.70 = 12,124.60 : x
  2. Step 2: Convert to fraction form
    28,745.80/43,118.70 = 12,124.60/x
  3. Step 3: Cross multiply
    28,745.80x = 43,118.70 × 12,124.60
  4. Step 4: Simplify right side
    28,745.80x = 522,796,990.02
  5. Step 5: Solve for x
    x = 522,796,990.02/28,745.80
  6. Step 6: Final answer
    x = 18,186.90

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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.