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Finding the Fourth Proportional to 18,593,145.80, 27,889,718.70 and 13,172,447.60

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Solution

The fourth proportional to 18,593,145.80, 27,889,718.70 and 13,172,447.60 is: 19,758,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,593,145.80 : 27,889,718.70 = 13,172,447.60 : x
  2. Step 2: Convert to fraction form
    18,593,145.80/27,889,718.70 = 13,172,447.60/x
  3. Step 3: Cross multiply
    18,593,145.80x = 27,889,718.70 × 13,172,447.60
  4. Step 4: Simplify right side
    18,593,145.80x = 367,375,858,154,490.12
  5. Step 5: Solve for x
    x = 367,375,858,154,490.12/18,593,145.80
  6. Step 6: Final answer
    x = 19,758,671.40

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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.