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Finding the Fourth Proportional to 18,930,653.86, 28,398,916.71 and 8,000,889.49

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Solution

The fourth proportional to 18,930,653.86, 28,398,916.71 and 8,000,889.49 is: 12,002,575.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930,653.86 : 28,398,916.71 = 8,000,889.49 : x
  2. Step 2: Convert to fraction form
    18,930,653.86/28,398,916.71 = 8,000,889.49/x
  3. Step 3: Cross multiply
    18,930,653.86x = 28,398,916.71 × 8,000,889.49
  4. Step 4: Simplify right side
    18,930,653.86x = 227,216,594,232,424.41
  5. Step 5: Solve for x
    x = 227,216,594,232,424.41/18,930,653.86
  6. Step 6: Final answer
    x = 12,002,575.08

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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.