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Finding the Fourth Proportional to 8,989.30, 13,413.64 and 8,055.36

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Solution

The fourth proportional to 8,989.30, 13,413.64 and 8,055.36 is: 12,020.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.30 : 13,413.64 = 8,055.36 : x
  2. Step 2: Convert to fraction form
    8,989.30/13,413.64 = 8,055.36/x
  3. Step 3: Cross multiply
    8,989.30x = 13,413.64 × 8,055.36
  4. Step 4: Simplify right side
    8,989.30x = 108,051,699.11
  5. Step 5: Solve for x
    x = 108,051,699.11/8,989.30
  6. Step 6: Final answer
    x = 12,020.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.