Home / 21,239,015.49-31,845,709.41-8,109,290.72

Finding the Fourth Proportional to 21,239,015.49, 31,845,709.41 and 8,109,290.72

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Solution

The fourth proportional to 21,239,015.49, 31,845,709.41 and 8,109,290.72 is: 12,159,043.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239,015.49 : 31,845,709.41 = 8,109,290.72 : x
  2. Step 2: Convert to fraction form
    21,239,015.49/31,845,709.41 = 8,109,290.72/x
  3. Step 3: Cross multiply
    21,239,015.49x = 31,845,709.41 × 8,109,290.72
  4. Step 4: Simplify right side
    21,239,015.49x = 258,246,115,631,101.12
  5. Step 5: Solve for x
    x = 258,246,115,631,101.12/21,239,015.49
  6. Step 6: Final answer
    x = 12,159,043.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.