Home / 12,579.20-18,866.40-3,814.40

Finding the Fourth Proportional to 12,579.20, 18,866.40 and 3,814.40

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Solution

The fourth proportional to 12,579.20, 18,866.40 and 3,814.40 is: 5,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.20 : 18,866.40 = 3,814.40 : x
  2. Step 2: Convert to fraction form
    12,579.20/18,866.40 = 3,814.40/x
  3. Step 3: Cross multiply
    12,579.20x = 18,866.40 × 3,814.40
  4. Step 4: Simplify right side
    12,579.20x = 71,963,996.16
  5. Step 5: Solve for x
    x = 71,963,996.16/12,579.20
  6. Step 6: Final answer
    x = 5,720.87

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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.