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Finding the Fourth Proportional to 18,755.89, 25,886.59 and 12,049.90

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Solution

The fourth proportional to 18,755.89, 25,886.59 and 12,049.90 is: 16,631.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.89 : 25,886.59 = 12,049.90 : x
  2. Step 2: Convert to fraction form
    18,755.89/25,886.59 = 12,049.90/x
  3. Step 3: Cross multiply
    18,755.89x = 25,886.59 × 12,049.90
  4. Step 4: Simplify right side
    18,755.89x = 311,930,726.00
  5. Step 5: Solve for x
    x = 311,930,726.00/18,755.89
  6. Step 6: Final answer
    x = 16,631.08

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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.