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Finding the Fourth Proportional to 13,671.05, 18,866.04 and 7,383.42

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Solution

The fourth proportional to 13,671.05, 18,866.04 and 7,383.42 is: 10,189.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.05 : 18,866.04 = 7,383.42 : x
  2. Step 2: Convert to fraction form
    13,671.05/18,866.04 = 7,383.42/x
  3. Step 3: Cross multiply
    13,671.05x = 18,866.04 × 7,383.42
  4. Step 4: Simplify right side
    13,671.05x = 139,295,897.06
  5. Step 5: Solve for x
    x = 139,295,897.06/13,671.05
  6. Step 6: Final answer
    x = 10,189.12

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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.