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Finding the Fourth Proportional to 20,554.88, 30,813.80 and 7,398

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Solution

The fourth proportional to 20,554.88, 30,813.80 and 7,398 is: 11,090.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.88 : 30,813.80 = 7,398 : x
  2. Step 2: Convert to fraction form
    20,554.88/30,813.80 = 7,398/x
  3. Step 3: Cross multiply
    20,554.88x = 30,813.80 × 7,398
  4. Step 4: Simplify right side
    20,554.88x = 227,960,455.41
  5. Step 5: Solve for x
    x = 227,960,455.41/20,554.88
  6. Step 6: Final answer
    x = 11,090.34

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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.