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Finding the Fourth Proportional to 12,628, 17,427.18 and 7,039

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Solution

The fourth proportional to 12,628, 17,427.18 and 7,039 is: 9,714.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628 : 17,427.18 = 7,039 : x
  2. Step 2: Convert to fraction form
    12,628/17,427.18 = 7,039/x
  3. Step 3: Cross multiply
    12,628x = 17,427.18 × 7,039
  4. Step 4: Simplify right side
    12,628x = 122,669,920.02
  5. Step 5: Solve for x
    x = 122,669,920.02/12,628
  6. Step 6: Final answer
    x = 9,714.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.