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Finding the Fourth Proportional to 13,903.88, 19,189.86 and 8,869.62

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Solution

The fourth proportional to 13,903.88, 19,189.86 and 8,869.62 is: 12,241.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.88 : 19,189.86 = 8,869.62 : x
  2. Step 2: Convert to fraction form
    13,903.88/19,189.86 = 8,869.62/x
  3. Step 3: Cross multiply
    13,903.88x = 19,189.86 × 8,869.62
  4. Step 4: Simplify right side
    13,903.88x = 170,206,766.05
  5. Step 5: Solve for x
    x = 170,206,766.05/13,903.88
  6. Step 6: Final answer
    x = 12,241.67

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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.