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Finding the Fourth Proportional to 13,355.54, 18,413.67 and 8,817.50

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Solution

The fourth proportional to 13,355.54, 18,413.67 and 8,817.50 is: 12,156.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.54 : 18,413.67 = 8,817.50 : x
  2. Step 2: Convert to fraction form
    13,355.54/18,413.67 = 8,817.50/x
  3. Step 3: Cross multiply
    13,355.54x = 18,413.67 × 8,817.50
  4. Step 4: Simplify right side
    13,355.54x = 162,362,535.23
  5. Step 5: Solve for x
    x = 162,362,535.23/13,355.54
  6. Step 6: Final answer
    x = 12,156.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.