Home / 12,090.20-18,135.90-4,299.62

Finding the Fourth Proportional to 12,090.20, 18,135.90 and 4,299.62

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Solution

The fourth proportional to 12,090.20, 18,135.90 and 4,299.62 is: 6,449.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.20 : 18,135.90 = 4,299.62 : x
  2. Step 2: Convert to fraction form
    12,090.20/18,135.90 = 4,299.62/x
  3. Step 3: Cross multiply
    12,090.20x = 18,135.90 × 4,299.62
  4. Step 4: Simplify right side
    12,090.20x = 77,977,478.36
  5. Step 5: Solve for x
    x = 77,977,478.36/12,090.20
  6. Step 6: Final answer
    x = 6,449.64

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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.