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Finding the Fourth Proportional to 21,990.64, 32,987.49 and 8,843.02

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Solution

The fourth proportional to 21,990.64, 32,987.49 and 8,843.02 is: 13,265.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.64 : 32,987.49 = 8,843.02 : x
  2. Step 2: Convert to fraction form
    21,990.64/32,987.49 = 8,843.02/x
  3. Step 3: Cross multiply
    21,990.64x = 32,987.49 × 8,843.02
  4. Step 4: Simplify right side
    21,990.64x = 291,709,033.82
  5. Step 5: Solve for x
    x = 291,709,033.82/21,990.64
  6. Step 6: Final answer
    x = 13,265.15

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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.