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Finding the Fourth Proportional to 21,058.14, 29,059.77 and 13,879.38

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Solution

The fourth proportional to 21,058.14, 29,059.77 and 13,879.38 is: 19,153.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,058.14 : 29,059.77 = 13,879.38 : x
  2. Step 2: Convert to fraction form
    21,058.14/29,059.77 = 13,879.38/x
  3. Step 3: Cross multiply
    21,058.14x = 29,059.77 × 13,879.38
  4. Step 4: Simplify right side
    21,058.14x = 403,331,590.54
  5. Step 5: Solve for x
    x = 403,331,590.54/21,058.14
  6. Step 6: Final answer
    x = 19,153.24

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1.5x scale

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.