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Finding the Fourth Proportional to 13,458.92, 20,207.12 and 6,889.64

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Solution

The fourth proportional to 13,458.92, 20,207.12 and 6,889.64 is: 10,344.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.92 : 20,207.12 = 6,889.64 : x
  2. Step 2: Convert to fraction form
    13,458.92/20,207.12 = 6,889.64/x
  3. Step 3: Cross multiply
    13,458.92x = 20,207.12 × 6,889.64
  4. Step 4: Simplify right side
    13,458.92x = 139,219,782.24
  5. Step 5: Solve for x
    x = 139,219,782.24/13,458.92
  6. Step 6: Final answer
    x = 10,344.05

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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.