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Finding the Fourth Proportional to 8,991.20, 13,486.80 and 6,804.20

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Solution

The fourth proportional to 8,991.20, 13,486.80 and 6,804.20 is: 10,206.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.20 : 13,486.80 = 6,804.20 : x
  2. Step 2: Convert to fraction form
    8,991.20/13,486.80 = 6,804.20/x
  3. Step 3: Cross multiply
    8,991.20x = 13,486.80 × 6,804.20
  4. Step 4: Simplify right side
    8,991.20x = 91,766,884.56
  5. Step 5: Solve for x
    x = 91,766,884.56/8,991.20
  6. Step 6: Final answer
    x = 10,206.30

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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.