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Finding the Fourth Proportional to 12,978,352.81, 17,904,717.30 and 7,470,409.71

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Solution

The fourth proportional to 12,978,352.81, 17,904,717.30 and 7,470,409.71 is: 10,306,051.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978,352.81 : 17,904,717.30 = 7,470,409.71 : x
  2. Step 2: Convert to fraction form
    12,978,352.81/17,904,717.30 = 7,470,409.71/x
  3. Step 3: Cross multiply
    12,978,352.81x = 17,904,717.30 × 7,470,409.71
  4. Step 4: Simplify right side
    12,978,352.81x = 133,755,573,972,724.98
  5. Step 5: Solve for x
    x = 133,755,573,972,724.98/12,978,352.81
  6. Step 6: Final answer
    x = 10,306,051.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.