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Finding the Fourth Proportional to 14,582.80, 21,841.80 and 11,990.80

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Solution

The fourth proportional to 14,582.80, 21,841.80 and 11,990.80 is: 17,959.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,582.80 : 21,841.80 = 11,990.80 : x
  2. Step 2: Convert to fraction form
    14,582.80/21,841.80 = 11,990.80/x
  3. Step 3: Cross multiply
    14,582.80x = 21,841.80 × 11,990.80
  4. Step 4: Simplify right side
    14,582.80x = 261,900,655.44
  5. Step 5: Solve for x
    x = 261,900,655.44/14,582.80
  6. Step 6: Final answer
    x = 17,959.56

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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.