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Finding the Fourth Proportional to 18,689,967.70, 28,019,205.15 and 9,714,519.70

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Solution

The fourth proportional to 18,689,967.70, 28,019,205.15 and 9,714,519.70 is: 14,563,595.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689,967.70 : 28,019,205.15 = 9,714,519.70 : x
  2. Step 2: Convert to fraction form
    18,689,967.70/28,019,205.15 = 9,714,519.70/x
  3. Step 3: Cross multiply
    18,689,967.70x = 28,019,205.15 × 9,714,519.70
  4. Step 4: Simplify right side
    18,689,967.70x = 272,193,120,408,016.41
  5. Step 5: Solve for x
    x = 272,193,120,408,016.41/18,689,967.70
  6. Step 6: Final answer
    x = 14,563,595.01

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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.