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Finding the Fourth Proportional to 28,986.12, 43,480.80 and 8,208

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Solution

The fourth proportional to 28,986.12, 43,480.80 and 8,208 is: 12,312.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.12 : 43,480.80 = 8,208 : x
  2. Step 2: Convert to fraction form
    28,986.12/43,480.80 = 8,208/x
  3. Step 3: Cross multiply
    28,986.12x = 43,480.80 × 8,208
  4. Step 4: Simplify right side
    28,986.12x = 356,890,406.40
  5. Step 5: Solve for x
    x = 356,890,406.40/28,986.12
  6. Step 6: Final answer
    x = 12,312.46

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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.