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Finding the Fourth Proportional to 13,401.81, 20,069.78 and 11,047.41

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Solution

The fourth proportional to 13,401.81, 20,069.78 and 11,047.41 is: 16,543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,401.81 : 20,069.78 = 11,047.41 : x
  2. Step 2: Convert to fraction form
    13,401.81/20,069.78 = 11,047.41/x
  3. Step 3: Cross multiply
    13,401.81x = 20,069.78 × 11,047.41
  4. Step 4: Simplify right side
    13,401.81x = 221,719,033.03
  5. Step 5: Solve for x
    x = 221,719,033.03/13,401.81
  6. Step 6: Final answer
    x = 16,543.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.