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Finding the Fourth Proportional to 12,914,978, 17,822,669.64 and 7,485,619.28

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Solution

The fourth proportional to 12,914,978, 17,822,669.64 and 7,485,619.28 is: 10,330,154.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,914,978 : 17,822,669.64 = 7,485,619.28 : x
  2. Step 2: Convert to fraction form
    12,914,978/17,822,669.64 = 7,485,619.28/x
  3. Step 3: Cross multiply
    12,914,978x = 17,822,669.64 × 7,485,619.28
  4. Step 4: Simplify right side
    12,914,978x = 133,413,719,478,254.67
  5. Step 5: Solve for x
    x = 133,413,719,478,254.67/12,914,978
  6. Step 6: Final answer
    x = 10,330,154.61

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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.