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Finding the Fourth Proportional to 12,639, 17,442.36 and 7,050

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Solution

The fourth proportional to 12,639, 17,442.36 and 7,050 is: 9,729.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639 : 17,442.36 = 7,050 : x
  2. Step 2: Convert to fraction form
    12,639/17,442.36 = 7,050/x
  3. Step 3: Cross multiply
    12,639x = 17,442.36 × 7,050
  4. Step 4: Simplify right side
    12,639x = 122,968,638
  5. Step 5: Solve for x
    x = 122,968,638/12,639
  6. Step 6: Final answer
    x = 9,729.30

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Why These Related Problems?

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