Home / 12,399.60-18,602.64-4,080.90

Finding the Fourth Proportional to 12,399.60, 18,602.64 and 4,080.90

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Solution

The fourth proportional to 12,399.60, 18,602.64 and 4,080.90 is: 6,122.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.60 : 18,602.64 = 4,080.90 : x
  2. Step 2: Convert to fraction form
    12,399.60/18,602.64 = 4,080.90/x
  3. Step 3: Cross multiply
    12,399.60x = 18,602.64 × 4,080.90
  4. Step 4: Simplify right side
    12,399.60x = 75,915,513.58
  5. Step 5: Solve for x
    x = 75,915,513.58/12,399.60
  6. Step 6: Final answer
    x = 6,122.42

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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.