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Finding the Fourth Proportional to 18,891.84, 26,076.72 and 11,813.76

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Solution

The fourth proportional to 18,891.84, 26,076.72 and 11,813.76 is: 16,306.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.84 : 26,076.72 = 11,813.76 : x
  2. Step 2: Convert to fraction form
    18,891.84/26,076.72 = 11,813.76/x
  3. Step 3: Cross multiply
    18,891.84x = 26,076.72 × 11,813.76
  4. Step 4: Simplify right side
    18,891.84x = 308,064,111.67
  5. Step 5: Solve for x
    x = 308,064,111.67/18,891.84
  6. Step 6: Final answer
    x = 16,306.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.