Home / 21,111.43-29,138.64-13,942.77

Finding the Fourth Proportional to 21,111.43, 29,138.64 and 13,942.77

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Solution

The fourth proportional to 21,111.43, 29,138.64 and 13,942.77 is: 19,244.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.43 : 29,138.64 = 13,942.77 : x
  2. Step 2: Convert to fraction form
    21,111.43/29,138.64 = 13,942.77/x
  3. Step 3: Cross multiply
    21,111.43x = 29,138.64 × 13,942.77
  4. Step 4: Simplify right side
    21,111.43x = 406,273,209.94
  5. Step 5: Solve for x
    x = 406,273,209.94/21,111.43
  6. Step 6: Final answer
    x = 19,244.23

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Double scale
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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.