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Finding the Fourth Proportional to 17,811.48, 26,717.04 and 7,420.80

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Solution

The fourth proportional to 17,811.48, 26,717.04 and 7,420.80 is: 11,131.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,811.48 : 26,717.04 = 7,420.80 : x
  2. Step 2: Convert to fraction form
    17,811.48/26,717.04 = 7,420.80/x
  3. Step 3: Cross multiply
    17,811.48x = 26,717.04 × 7,420.80
  4. Step 4: Simplify right side
    17,811.48x = 198,261,810.43
  5. Step 5: Solve for x
    x = 198,261,810.43/17,811.48
  6. Step 6: Final answer
    x = 11,131.13

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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.