Home / 21,420,365.72-29,552,804.86-13,689,867.48

Finding the Fourth Proportional to 21,420,365.72, 29,552,804.86 and 13,689,867.48

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Solution

The fourth proportional to 21,420,365.72, 29,552,804.86 and 13,689,867.48 is: 18,887,351.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420,365.72 : 29,552,804.86 = 13,689,867.48 : x
  2. Step 2: Convert to fraction form
    21,420,365.72/29,552,804.86 = 13,689,867.48/x
  3. Step 3: Cross multiply
    21,420,365.72x = 29,552,804.86 × 13,689,867.48
  4. Step 4: Simplify right side
    21,420,365.72x = 404,573,982,195,699.94
  5. Step 5: Solve for x
    x = 404,573,982,195,699.94/21,420,365.72
  6. Step 6: Final answer
    x = 18,887,351.76

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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.