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Finding the Fourth Proportional to 8,991.56, 12,413.68 and 7,994.08

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Solution

The fourth proportional to 8,991.56, 12,413.68 and 7,994.08 is: 11,036.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.56 : 12,413.68 = 7,994.08 : x
  2. Step 2: Convert to fraction form
    8,991.56/12,413.68 = 7,994.08/x
  3. Step 3: Cross multiply
    8,991.56x = 12,413.68 × 7,994.08
  4. Step 4: Simplify right side
    8,991.56x = 99,235,992.04
  5. Step 5: Solve for x
    x = 99,235,992.04/8,991.56
  6. Step 6: Final answer
    x = 11,036.57

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Half scale
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Double scale
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Similar ratio
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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.