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Finding the Fourth Proportional to 8,990.12, 13,449.04 and 7,770.62

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Solution

The fourth proportional to 8,990.12, 13,449.04 and 7,770.62 is: 11,624.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.12 : 13,449.04 = 7,770.62 : x
  2. Step 2: Convert to fraction form
    8,990.12/13,449.04 = 7,770.62/x
  3. Step 3: Cross multiply
    8,990.12x = 13,449.04 × 7,770.62
  4. Step 4: Simplify right side
    8,990.12x = 104,507,379.20
  5. Step 5: Solve for x
    x = 104,507,379.20/8,990.12
  6. Step 6: Final answer
    x = 11,624.69

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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.