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Finding the Fourth Proportional to 13,670.94, 18,865.90 and 7,383.32

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Solution

The fourth proportional to 13,670.94, 18,865.90 and 7,383.32 is: 10,188.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.94 : 18,865.90 = 7,383.32 : x
  2. Step 2: Convert to fraction form
    13,670.94/18,865.90 = 7,383.32/x
  3. Step 3: Cross multiply
    13,670.94x = 18,865.90 × 7,383.32
  4. Step 4: Simplify right side
    13,670.94x = 139,292,845.54
  5. Step 5: Solve for x
    x = 139,292,845.54/13,670.94
  6. Step 6: Final answer
    x = 10,188.97

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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.