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Finding the Fourth Proportional to 21,802.50, 32,702.07 and 12,413.04

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Solution

The fourth proportional to 21,802.50, 32,702.07 and 12,413.04 is: 18,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,802.50 : 32,702.07 = 12,413.04 : x
  2. Step 2: Convert to fraction form
    21,802.50/32,702.07 = 12,413.04/x
  3. Step 3: Cross multiply
    21,802.50x = 32,702.07 × 12,413.04
  4. Step 4: Simplify right side
    21,802.50x = 405,932,102.99
  5. Step 5: Solve for x
    x = 405,932,102.99/21,802.50
  6. Step 6: Final answer
    x = 18,618.60

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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.