Home / 21,101,043.78-29,121,005.79-11,809,545.12

Finding the Fourth Proportional to 21,101,043.78, 29,121,005.79 and 11,809,545.12

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Solution

The fourth proportional to 21,101,043.78, 29,121,005.79 and 11,809,545.12 is: 16,298,048.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101,043.78 : 29,121,005.79 = 11,809,545.12 : x
  2. Step 2: Convert to fraction form
    21,101,043.78/29,121,005.79 = 11,809,545.12/x
  3. Step 3: Cross multiply
    21,101,043.78x = 29,121,005.79 × 11,809,545.12
  4. Step 4: Simplify right side
    21,101,043.78x = 343,905,831,816,786.19
  5. Step 5: Solve for x
    x = 343,905,831,816,786.19/21,101,043.78
  6. Step 6: Final answer
    x = 16,298,048.35

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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.