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Finding the Fourth Proportional to 13,670.81, 18,865.73 and 7,383.19

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Solution

The fourth proportional to 13,670.81, 18,865.73 and 7,383.19 is: 10,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.81 : 18,865.73 = 7,383.19 : x
  2. Step 2: Convert to fraction form
    13,670.81/18,865.73 = 7,383.19/x
  3. Step 3: Cross multiply
    13,670.81x = 18,865.73 × 7,383.19
  4. Step 4: Simplify right side
    13,670.81x = 139,289,185.00
  5. Step 5: Solve for x
    x = 139,289,185.00/13,670.81
  6. Step 6: Final answer
    x = 10,188.80

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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.