Home / 21,080.62-31,639.11-11,729.98

Finding the Fourth Proportional to 21,080.62, 31,639.11 and 11,729.98

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Solution

The fourth proportional to 21,080.62, 31,639.11 and 11,729.98 is: 17,605.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.62 : 31,639.11 = 11,729.98 : x
  2. Step 2: Convert to fraction form
    21,080.62/31,639.11 = 11,729.98/x
  3. Step 3: Cross multiply
    21,080.62x = 31,639.11 × 11,729.98
  4. Step 4: Simplify right side
    21,080.62x = 371,126,127.52
  5. Step 5: Solve for x
    x = 371,126,127.52/21,080.62
  6. Step 6: Final answer
    x = 17,605.09

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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.