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Finding the Fourth Proportional to 19,242, 28,779.62 and 11,325.65

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Solution

The fourth proportional to 19,242, 28,779.62 and 11,325.65 is: 16,939.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,242 : 28,779.62 = 11,325.65 : x
  2. Step 2: Convert to fraction form
    19,242/28,779.62 = 11,325.65/x
  3. Step 3: Cross multiply
    19,242x = 28,779.62 × 11,325.65
  4. Step 4: Simplify right side
    19,242x = 325,947,702.73
  5. Step 5: Solve for x
    x = 325,947,702.73/19,242
  6. Step 6: Final answer
    x = 16,939.39

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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.