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Finding the Fourth Proportional to 13,749.81, 20,502.12 and 12,672.71

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Solution

The fourth proportional to 13,749.81, 20,502.12 and 12,672.71 is: 18,896.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.81 : 20,502.12 = 12,672.71 : x
  2. Step 2: Convert to fraction form
    13,749.81/20,502.12 = 12,672.71/x
  3. Step 3: Cross multiply
    13,749.81x = 20,502.12 × 12,672.71
  4. Step 4: Simplify right side
    13,749.81x = 259,817,421.15
  5. Step 5: Solve for x
    x = 259,817,421.15/13,749.81
  6. Step 6: Final answer
    x = 18,896.07

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.