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Finding the Fourth Proportional to 8,990.56, 13,490.06 and 4,611.10

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Solution

The fourth proportional to 8,990.56, 13,490.06 and 4,611.10 is: 6,918.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.56 : 13,490.06 = 4,611.10 : x
  2. Step 2: Convert to fraction form
    8,990.56/13,490.06 = 4,611.10/x
  3. Step 3: Cross multiply
    8,990.56x = 13,490.06 × 4,611.10
  4. Step 4: Simplify right side
    8,990.56x = 62,204,015.67
  5. Step 5: Solve for x
    x = 62,204,015.67/8,990.56
  6. Step 6: Final answer
    x = 6,918.81

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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.