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Finding the Fourth Proportional to 12,914,980, 17,822,672.40 and 7,485,621.28

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Solution

The fourth proportional to 12,914,980, 17,822,672.40 and 7,485,621.28 is: 10,330,157.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,914,980 : 17,822,672.40 = 7,485,621.28 : x
  2. Step 2: Convert to fraction form
    12,914,980/17,822,672.40 = 7,485,621.28/x
  3. Step 3: Cross multiply
    12,914,980x = 17,822,672.40 × 7,485,621.28
  4. Step 4: Simplify right side
    12,914,980x = 133,413,775,783,908.67
  5. Step 5: Solve for x
    x = 133,413,775,783,908.67/12,914,980
  6. Step 6: Final answer
    x = 10,330,157.37

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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.