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Finding the Fourth Proportional to 18,702.58, 28,051.14 and 7,609.48

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Solution

The fourth proportional to 18,702.58, 28,051.14 and 7,609.48 is: 11,413.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.58 : 28,051.14 = 7,609.48 : x
  2. Step 2: Convert to fraction form
    18,702.58/28,051.14 = 7,609.48/x
  3. Step 3: Cross multiply
    18,702.58x = 28,051.14 × 7,609.48
  4. Step 4: Simplify right side
    18,702.58x = 213,454,588.81
  5. Step 5: Solve for x
    x = 213,454,588.81/18,702.58
  6. Step 6: Final answer
    x = 11,413.11

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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.