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Finding the Fourth Proportional to 11,950,391.79, 17,890,709.49 and 8,889,957.45

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Solution

The fourth proportional to 11,950,391.79, 17,890,709.49 and 8,889,957.45 is: 13,308,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,950,391.79 : 17,890,709.49 = 8,889,957.45 : x
  2. Step 2: Convert to fraction form
    11,950,391.79/17,890,709.49 = 8,889,957.45/x
  3. Step 3: Cross multiply
    11,950,391.79x = 17,890,709.49 × 8,889,957.45
  4. Step 4: Simplify right side
    11,950,391.79x = 159,047,646,116,411.19
  5. Step 5: Solve for x
    x = 159,047,646,116,411.19/11,950,391.79
  6. Step 6: Final answer
    x = 13,308,990.11

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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.