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Finding the Fourth Proportional to 18,702.30, 28,054.71 and 7,608.90

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Solution

The fourth proportional to 18,702.30, 28,054.71 and 7,608.90 is: 11,413.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.30 : 28,054.71 = 7,608.90 : x
  2. Step 2: Convert to fraction form
    18,702.30/28,054.71 = 7,608.90/x
  3. Step 3: Cross multiply
    18,702.30x = 28,054.71 × 7,608.90
  4. Step 4: Simplify right side
    18,702.30x = 213,465,482.92
  5. Step 5: Solve for x
    x = 213,465,482.92/18,702.30
  6. Step 6: Final answer
    x = 11,413.86

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1.5x scale

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.