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Finding the Fourth Proportional to 13,671.63, 18,866.31 and 7,704.49

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Solution

The fourth proportional to 13,671.63, 18,866.31 and 7,704.49 is: 10,631.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.63 : 18,866.31 = 7,704.49 : x
  2. Step 2: Convert to fraction form
    13,671.63/18,866.31 = 7,704.49/x
  3. Step 3: Cross multiply
    13,671.63x = 18,866.31 × 7,704.49
  4. Step 4: Simplify right side
    13,671.63x = 145,355,296.73
  5. Step 5: Solve for x
    x = 145,355,296.73/13,671.63
  6. Step 6: Final answer
    x = 10,631.89

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1.5x scale

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.