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Finding the Fourth Proportional to 28,893.40, 43,311.30 and 13,283.80

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Solution

The fourth proportional to 28,893.40, 43,311.30 and 13,283.80 is: 19,912.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,893.40 : 43,311.30 = 13,283.80 : x
  2. Step 2: Convert to fraction form
    28,893.40/43,311.30 = 13,283.80/x
  3. Step 3: Cross multiply
    28,893.40x = 43,311.30 × 13,283.80
  4. Step 4: Simplify right side
    28,893.40x = 575,338,646.94
  5. Step 5: Solve for x
    x = 575,338,646.94/28,893.40
  6. Step 6: Final answer
    x = 19,912.46

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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.