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Finding the Fourth Proportional to 28,893.60, 43,316.40 and 12,266.40

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Solution

The fourth proportional to 28,893.60, 43,316.40 and 12,266.40 is: 18,389.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,893.60 : 43,316.40 = 12,266.40 : x
  2. Step 2: Convert to fraction form
    28,893.60/43,316.40 = 12,266.40/x
  3. Step 3: Cross multiply
    28,893.60x = 43,316.40 × 12,266.40
  4. Step 4: Simplify right side
    28,893.60x = 531,336,288.96
  5. Step 5: Solve for x
    x = 531,336,288.96/28,893.60
  6. Step 6: Final answer
    x = 18,389.41

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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.