Home / 12,978,971.36-17,910,875.92-7,177,997.60

Finding the Fourth Proportional to 12,978,971.36, 17,910,875.92 and 7,177,997.60

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Solution

The fourth proportional to 12,978,971.36, 17,910,875.92 and 7,177,997.60 is: 9,905,578.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978,971.36 : 17,910,875.92 = 7,177,997.60 : x
  2. Step 2: Convert to fraction form
    12,978,971.36/17,910,875.92 = 7,177,997.60/x
  3. Step 3: Cross multiply
    12,978,971.36x = 17,910,875.92 × 7,177,997.60
  4. Step 4: Simplify right side
    12,978,971.36x = 128,564,224,367,657.80
  5. Step 5: Solve for x
    x = 128,564,224,367,657.80/12,978,971.36
  6. Step 6: Final answer
    x = 9,905,578.86

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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.