Home / 13,638.64-20,458.68-4,405.36

Finding the Fourth Proportional to 13,638.64, 20,458.68 and 4,405.36

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Solution

The fourth proportional to 13,638.64, 20,458.68 and 4,405.36 is: 6,608.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.64 : 20,458.68 = 4,405.36 : x
  2. Step 2: Convert to fraction form
    13,638.64/20,458.68 = 4,405.36/x
  3. Step 3: Cross multiply
    13,638.64x = 20,458.68 × 4,405.36
  4. Step 4: Simplify right side
    13,638.64x = 90,127,850.52
  5. Step 5: Solve for x
    x = 90,127,850.52/13,638.64
  6. Step 6: Final answer
    x = 6,608.27

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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.