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Finding the Fourth Proportional to 12,604.91, 18,888.80 and 11,220.89

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Solution

The fourth proportional to 12,604.91, 18,888.80 and 11,220.89 is: 16,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,604.91 : 18,888.80 = 11,220.89 : x
  2. Step 2: Convert to fraction form
    12,604.91/18,888.80 = 11,220.89/x
  3. Step 3: Cross multiply
    12,604.91x = 18,888.80 × 11,220.89
  4. Step 4: Simplify right side
    12,604.91x = 211,948,996.48
  5. Step 5: Solve for x
    x = 211,948,996.48/12,604.91
  6. Step 6: Final answer
    x = 16,814.80

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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.