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Finding the Fourth Proportional to 18,885,723.60, 28,370,575.80 and 18,171,886.80

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Solution

The fourth proportional to 18,885,723.60, 28,370,575.80 and 18,171,886.80 is: 27,298,233.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885,723.60 : 28,370,575.80 = 18,171,886.80 : x
  2. Step 2: Convert to fraction form
    18,885,723.60/28,370,575.80 = 18,171,886.80/x
  3. Step 3: Cross multiply
    18,885,723.60x = 28,370,575.80 × 18,171,886.80
  4. Step 4: Simplify right side
    18,885,723.60x = 515,546,891,888,419.50
  5. Step 5: Solve for x
    x = 515,546,891,888,419.50/18,885,723.60
  6. Step 6: Final answer
    x = 27,298,233.46

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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.