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Finding the Fourth Proportional to 8,990.64, 13,451.40 and 5,480.01

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Solution

The fourth proportional to 8,990.64, 13,451.40 and 5,480.01 is: 8,198.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.64 : 13,451.40 = 5,480.01 : x
  2. Step 2: Convert to fraction form
    8,990.64/13,451.40 = 5,480.01/x
  3. Step 3: Cross multiply
    8,990.64x = 13,451.40 × 5,480.01
  4. Step 4: Simplify right side
    8,990.64x = 73,713,806.51
  5. Step 5: Solve for x
    x = 73,713,806.51/8,990.64
  6. Step 6: Final answer
    x = 8,198.95

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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.