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Finding the Fourth Proportional to 19,639, 27,097.33 and 11,139.09

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Solution

The fourth proportional to 19,639, 27,097.33 and 11,139.09 is: 15,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639 : 27,097.33 = 11,139.09 : x
  2. Step 2: Convert to fraction form
    19,639/27,097.33 = 11,139.09/x
  3. Step 3: Cross multiply
    19,639x = 27,097.33 × 11,139.09
  4. Step 4: Simplify right side
    19,639x = 301,839,597.63
  5. Step 5: Solve for x
    x = 301,839,597.63/19,639
  6. Step 6: Final answer
    x = 15,369.40

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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.