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Finding the Fourth Proportional to 12,650, 18,950.16 and 11,930.72

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Solution

The fourth proportional to 12,650, 18,950.16 and 11,930.72 is: 17,872.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,650 : 18,950.16 = 11,930.72 : x
  2. Step 2: Convert to fraction form
    12,650/18,950.16 = 11,930.72/x
  3. Step 3: Cross multiply
    12,650x = 18,950.16 × 11,930.72
  4. Step 4: Simplify right side
    12,650x = 226,089,052.92
  5. Step 5: Solve for x
    x = 226,089,052.92/12,650
  6. Step 6: Final answer
    x = 17,872.65

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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.