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Finding the Fourth Proportional to 18,696.99, 25,804.64 and 11,990.19

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Solution

The fourth proportional to 18,696.99, 25,804.64 and 11,990.19 is: 16,548.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.99 : 25,804.64 = 11,990.19 : x
  2. Step 2: Convert to fraction form
    18,696.99/25,804.64 = 11,990.19/x
  3. Step 3: Cross multiply
    18,696.99x = 25,804.64 × 11,990.19
  4. Step 4: Simplify right side
    18,696.99x = 309,402,536.48
  5. Step 5: Solve for x
    x = 309,402,536.48/18,696.99
  6. Step 6: Final answer
    x = 16,548.25

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Half scale
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Double scale
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Similar ratio
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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.