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Finding the Fourth Proportional to 18,894,734.10, 28,342,101.15 and 12,400,218.90

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Solution

The fourth proportional to 18,894,734.10, 28,342,101.15 and 12,400,218.90 is: 18,600,328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894,734.10 : 28,342,101.15 = 12,400,218.90 : x
  2. Step 2: Convert to fraction form
    18,894,734.10/28,342,101.15 = 12,400,218.90/x
  3. Step 3: Cross multiply
    18,894,734.10x = 28,342,101.15 × 12,400,218.90
  4. Step 4: Simplify right side
    18,894,734.10x = 351,448,258,345,941.75
  5. Step 5: Solve for x
    x = 351,448,258,345,941.75/18,894,734.10
  6. Step 6: Final answer
    x = 18,600,328.35

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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.