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Finding the Fourth Proportional to 19,668,689.20, 29,503,033.80 and 12,015,938.80

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Solution

The fourth proportional to 19,668,689.20, 29,503,033.80 and 12,015,938.80 is: 18,023,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,668,689.20 : 29,503,033.80 = 12,015,938.80 : x
  2. Step 2: Convert to fraction form
    19,668,689.20/29,503,033.80 = 12,015,938.80/x
  3. Step 3: Cross multiply
    19,668,689.20x = 29,503,033.80 × 12,015,938.80
  4. Step 4: Simplify right side
    19,668,689.20x = 354,506,648,555,131.50
  5. Step 5: Solve for x
    x = 354,506,648,555,131.50/19,668,689.20
  6. Step 6: Final answer
    x = 18,023,908.20

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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.