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Finding the Fourth Proportional to 18,923.19, 26,112.74 and 10,963.99

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Solution

The fourth proportional to 18,923.19, 26,112.74 and 10,963.99 is: 15,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.19 : 26,112.74 = 10,963.99 : x
  2. Step 2: Convert to fraction form
    18,923.19/26,112.74 = 10,963.99/x
  3. Step 3: Cross multiply
    18,923.19x = 26,112.74 × 10,963.99
  4. Step 4: Simplify right side
    18,923.19x = 286,299,820.23
  5. Step 5: Solve for x
    x = 286,299,820.23/18,923.19
  6. Step 6: Final answer
    x = 15,129.57

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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.