Home / 18,936.70-26,134.59-11,385.49

Finding the Fourth Proportional to 18,936.70, 26,134.59 and 11,385.49

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Solution

The fourth proportional to 18,936.70, 26,134.59 and 11,385.49 is: 15,713.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.70 : 26,134.59 = 11,385.49 : x
  2. Step 2: Convert to fraction form
    18,936.70/26,134.59 = 11,385.49/x
  3. Step 3: Cross multiply
    18,936.70x = 26,134.59 × 11,385.49
  4. Step 4: Simplify right side
    18,936.70x = 297,555,113.10
  5. Step 5: Solve for x
    x = 297,555,113.10/18,936.70
  6. Step 6: Final answer
    x = 15,713.15

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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.