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Finding the Fourth Proportional to 18,719.17, 25,838.18 and 11,551.28

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Solution

The fourth proportional to 18,719.17, 25,838.18 and 11,551.28 is: 15,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.17 : 25,838.18 = 11,551.28 : x
  2. Step 2: Convert to fraction form
    18,719.17/25,838.18 = 11,551.28/x
  3. Step 3: Cross multiply
    18,719.17x = 25,838.18 × 11,551.28
  4. Step 4: Simplify right side
    18,719.17x = 298,464,053.58
  5. Step 5: Solve for x
    x = 298,464,053.58/18,719.17
  6. Step 6: Final answer
    x = 15,944.30

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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.