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Finding the Fourth Proportional to 28,887.50, 43,336.20 and 12,255.50

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Solution

The fourth proportional to 28,887.50, 43,336.20 and 12,255.50 is: 18,385.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,887.50 : 43,336.20 = 12,255.50 : x
  2. Step 2: Convert to fraction form
    28,887.50/43,336.20 = 12,255.50/x
  3. Step 3: Cross multiply
    28,887.50x = 43,336.20 × 12,255.50
  4. Step 4: Simplify right side
    28,887.50x = 531,106,799.10
  5. Step 5: Solve for x
    x = 531,106,799.10/28,887.50
  6. Step 6: Final answer
    x = 18,385.35

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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.