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Finding the Fourth Proportional to 27,103.66, 40,655.26 and 21,185.53

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Solution

The fourth proportional to 27,103.66, 40,655.26 and 21,185.53 is: 31,778.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,103.66 : 40,655.26 = 21,185.53 : x
  2. Step 2: Convert to fraction form
    27,103.66/40,655.26 = 21,185.53/x
  3. Step 3: Cross multiply
    27,103.66x = 40,655.26 × 21,185.53
  4. Step 4: Simplify right side
    27,103.66x = 861,303,230.39
  5. Step 5: Solve for x
    x = 861,303,230.39/27,103.66
  6. Step 6: Final answer
    x = 31,778.12

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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.