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Finding the Fourth Proportional to 8,889.92, 13,336.16 and 3,419.20

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Solution

The fourth proportional to 8,889.92, 13,336.16 and 3,419.20 is: 5,129.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.92 : 13,336.16 = 3,419.20 : x
  2. Step 2: Convert to fraction form
    8,889.92/13,336.16 = 3,419.20/x
  3. Step 3: Cross multiply
    8,889.92x = 13,336.16 × 3,419.20
  4. Step 4: Simplify right side
    8,889.92x = 45,598,998.27
  5. Step 5: Solve for x
    x = 45,598,998.27/8,889.92
  6. Step 6: Final answer
    x = 5,129.29

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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.