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Finding the Fourth Proportional to 12,618.86, 18,930.11 and 3,852.63

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Solution

The fourth proportional to 12,618.86, 18,930.11 and 3,852.63 is: 5,779.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.86 : 18,930.11 = 3,852.63 : x
  2. Step 2: Convert to fraction form
    12,618.86/18,930.11 = 3,852.63/x
  3. Step 3: Cross multiply
    12,618.86x = 18,930.11 × 3,852.63
  4. Step 4: Simplify right side
    12,618.86x = 72,930,690.43
  5. Step 5: Solve for x
    x = 72,930,690.43/12,618.86
  6. Step 6: Final answer
    x = 5,779.50

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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.