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Finding the Fourth Proportional to 28,907.60, 43,371.12 and 11,379.20

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Solution

The fourth proportional to 28,907.60, 43,371.12 and 11,379.20 is: 17,072.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,907.60 : 43,371.12 = 11,379.20 : x
  2. Step 2: Convert to fraction form
    28,907.60/43,371.12 = 11,379.20/x
  3. Step 3: Cross multiply
    28,907.60x = 43,371.12 × 11,379.20
  4. Step 4: Simplify right side
    28,907.60x = 493,528,648.70
  5. Step 5: Solve for x
    x = 493,528,648.70/28,907.60
  6. Step 6: Final answer
    x = 17,072.63

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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.