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Finding the Fourth Proportional to 12,629.90, 18,950.31 and 6,779.67

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Solution

The fourth proportional to 12,629.90, 18,950.31 and 6,779.67 is: 10,172.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.90 : 18,950.31 = 6,779.67 : x
  2. Step 2: Convert to fraction form
    12,629.90/18,950.31 = 6,779.67/x
  3. Step 3: Cross multiply
    12,629.90x = 18,950.31 × 6,779.67
  4. Step 4: Simplify right side
    12,629.90x = 128,476,848.20
  5. Step 5: Solve for x
    x = 128,476,848.20/12,629.90
  6. Step 6: Final answer
    x = 10,172.44

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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.