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Finding the Fourth Proportional to 19,954.51, 29,856.58 and 11,919.51

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Solution

The fourth proportional to 19,954.51, 29,856.58 and 11,919.51 is: 17,834.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,954.51 : 29,856.58 = 11,919.51 : x
  2. Step 2: Convert to fraction form
    19,954.51/29,856.58 = 11,919.51/x
  3. Step 3: Cross multiply
    19,954.51x = 29,856.58 × 11,919.51
  4. Step 4: Simplify right side
    19,954.51x = 355,875,803.88
  5. Step 5: Solve for x
    x = 355,875,803.88/19,954.51
  6. Step 6: Final answer
    x = 17,834.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.