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Finding the Fourth Proportional to 13,393.92, 20,169.84 and 11,683.20

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Solution

The fourth proportional to 13,393.92, 20,169.84 and 11,683.20 is: 17,593.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.92 : 20,169.84 = 11,683.20 : x
  2. Step 2: Convert to fraction form
    13,393.92/20,169.84 = 11,683.20/x
  3. Step 3: Cross multiply
    13,393.92x = 20,169.84 × 11,683.20
  4. Step 4: Simplify right side
    13,393.92x = 235,648,274.69
  5. Step 5: Solve for x
    x = 235,648,274.69/13,393.92
  6. Step 6: Final answer
    x = 17,593.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.