Home / 21,356,189-29,447,925.60-13,608,960.20

Finding the Fourth Proportional to 21,356,189, 29,447,925.60 and 13,608,960.20

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Solution

The fourth proportional to 21,356,189, 29,447,925.60 and 13,608,960.20 is: 18,765,316.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356,189 : 29,447,925.60 = 13,608,960.20 : x
  2. Step 2: Convert to fraction form
    21,356,189/29,447,925.60 = 13,608,960.20/x
  3. Step 3: Cross multiply
    21,356,189x = 29,447,925.60 × 13,608,960.20
  4. Step 4: Simplify right side
    21,356,189x = 400,755,647,462,961.12
  5. Step 5: Solve for x
    x = 400,755,647,462,961.12/21,356,189
  6. Step 6: Final answer
    x = 18,765,316.58

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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.