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Finding the Fourth Proportional to 12,675.83, 18,920.89 and 11,179.50

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Solution

The fourth proportional to 12,675.83, 18,920.89 and 11,179.50 is: 16,687.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,675.83 : 18,920.89 = 11,179.50 : x
  2. Step 2: Convert to fraction form
    12,675.83/18,920.89 = 11,179.50/x
  3. Step 3: Cross multiply
    12,675.83x = 18,920.89 × 11,179.50
  4. Step 4: Simplify right side
    12,675.83x = 211,526,089.76
  5. Step 5: Solve for x
    x = 211,526,089.76/12,675.83
  6. Step 6: Final answer
    x = 16,687.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.