Home / 12,431.32-18,647.94-3,547.28

Finding the Fourth Proportional to 12,431.32, 18,647.94 and 3,547.28

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Solution

The fourth proportional to 12,431.32, 18,647.94 and 3,547.28 is: 5,321.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.32 : 18,647.94 = 3,547.28 : x
  2. Step 2: Convert to fraction form
    12,431.32/18,647.94 = 3,547.28/x
  3. Step 3: Cross multiply
    12,431.32x = 18,647.94 × 3,547.28
  4. Step 4: Simplify right side
    12,431.32x = 66,149,464.60
  5. Step 5: Solve for x
    x = 66,149,464.60/12,431.32
  6. Step 6: Final answer
    x = 5,321.19

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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.