Home / 31,728,221.89-43,798,339.35-21,428,895.31

Finding the Fourth Proportional to 31,728,221.89, 43,798,339.35 and 21,428,895.31

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Solution

The fourth proportional to 31,728,221.89, 43,798,339.35 and 21,428,895.31 is: 29,580,921.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,728,221.89 : 43,798,339.35 = 21,428,895.31 : x
  2. Step 2: Convert to fraction form
    31,728,221.89/43,798,339.35 = 21,428,895.31/x
  3. Step 3: Cross multiply
    31,728,221.89x = 43,798,339.35 × 21,428,895.31
  4. Step 4: Simplify right side
    31,728,221.89x = 938,550,028,683,003.38
  5. Step 5: Solve for x
    x = 938,550,028,683,003.38/31,728,221.89
  6. Step 6: Final answer
    x = 29,580,921.11

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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.