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Finding the Fourth Proportional to 21,535.38, 29,719.26 and 12,104.10

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Solution

The fourth proportional to 21,535.38, 29,719.26 and 12,104.10 is: 16,703.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,535.38 : 29,719.26 = 12,104.10 : x
  2. Step 2: Convert to fraction form
    21,535.38/29,719.26 = 12,104.10/x
  3. Step 3: Cross multiply
    21,535.38x = 29,719.26 × 12,104.10
  4. Step 4: Simplify right side
    21,535.38x = 359,724,894.97
  5. Step 5: Solve for x
    x = 359,724,894.97/21,535.38
  6. Step 6: Final answer
    x = 16,703.90

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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.