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Finding the Fourth Proportional to 18,571.66, 27,854.50 and 5,420.95

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Solution

The fourth proportional to 18,571.66, 27,854.50 and 5,420.95 is: 8,130.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,571.66 : 27,854.50 = 5,420.95 : x
  2. Step 2: Convert to fraction form
    18,571.66/27,854.50 = 5,420.95/x
  3. Step 3: Cross multiply
    18,571.66x = 27,854.50 × 5,420.95
  4. Step 4: Simplify right side
    18,571.66x = 150,997,851.78
  5. Step 5: Solve for x
    x = 150,997,851.78/18,571.66
  6. Step 6: Final answer
    x = 8,130.55

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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.