Home / 12,428.12-18,642.08-3,662.91

Finding the Fourth Proportional to 12,428.12, 18,642.08 and 3,662.91

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Solution

The fourth proportional to 12,428.12, 18,642.08 and 3,662.91 is: 5,494.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.12 : 18,642.08 = 3,662.91 : x
  2. Step 2: Convert to fraction form
    12,428.12/18,642.08 = 3,662.91/x
  3. Step 3: Cross multiply
    12,428.12x = 18,642.08 × 3,662.91
  4. Step 4: Simplify right side
    12,428.12x = 68,284,270.41
  5. Step 5: Solve for x
    x = 68,284,270.41/12,428.12
  6. Step 6: Final answer
    x = 5,494.34

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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.