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Finding the Fourth Proportional to 14,871.48, 20,511.90 and 12,629.82

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Solution

The fourth proportional to 14,871.48, 20,511.90 and 12,629.82 is: 17,420.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,871.48 : 20,511.90 = 12,629.82 : x
  2. Step 2: Convert to fraction form
    14,871.48/20,511.90 = 12,629.82/x
  3. Step 3: Cross multiply
    14,871.48x = 20,511.90 × 12,629.82
  4. Step 4: Simplify right side
    14,871.48x = 259,061,604.86
  5. Step 5: Solve for x
    x = 259,061,604.86/14,871.48
  6. Step 6: Final answer
    x = 17,420.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.