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Finding the Fourth Proportional to 19,505.39, 26,917.17 and 10,891.70

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Solution

The fourth proportional to 19,505.39, 26,917.17 and 10,891.70 is: 15,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,505.39 : 26,917.17 = 10,891.70 : x
  2. Step 2: Convert to fraction form
    19,505.39/26,917.17 = 10,891.70/x
  3. Step 3: Cross multiply
    19,505.39x = 26,917.17 × 10,891.70
  4. Step 4: Simplify right side
    19,505.39x = 293,173,740.49
  5. Step 5: Solve for x
    x = 293,173,740.49/19,505.39
  6. Step 6: Final answer
    x = 15,030.40

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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.