Home / 21,139,904.54-29,172,572.08-12,438,640.73

Finding the Fourth Proportional to 21,139,904.54, 29,172,572.08 and 12,438,640.73

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Solution

The fourth proportional to 21,139,904.54, 29,172,572.08 and 12,438,640.73 is: 17,165,032.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139,904.54 : 29,172,572.08 = 12,438,640.73 : x
  2. Step 2: Convert to fraction form
    21,139,904.54/29,172,572.08 = 12,438,640.73/x
  3. Step 3: Cross multiply
    21,139,904.54x = 29,172,572.08 × 12,438,640.73
  4. Step 4: Simplify right side
    21,139,904.54x = 362,867,143,314,983.62
  5. Step 5: Solve for x
    x = 362,867,143,314,983.62/21,139,904.54
  6. Step 6: Final answer
    x = 17,165,032.25

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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.