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Finding the Fourth Proportional to 13,672.02, 18,867.38 and 7,384.39

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Solution

The fourth proportional to 13,672.02, 18,867.38 and 7,384.39 is: 10,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.02 : 18,867.38 = 7,384.39 : x
  2. Step 2: Convert to fraction form
    13,672.02/18,867.38 = 7,384.39/x
  3. Step 3: Cross multiply
    13,672.02x = 18,867.38 × 7,384.39
  4. Step 4: Simplify right side
    13,672.02x = 139,324,092.20
  5. Step 5: Solve for x
    x = 139,324,092.20/13,672.02
  6. Step 6: Final answer
    x = 10,190.45

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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.