Home / 21,091.18-29,107.65-11,661.55

Finding the Fourth Proportional to 21,091.18, 29,107.65 and 11,661.55

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Solution

The fourth proportional to 21,091.18, 29,107.65 and 11,661.55 is: 16,093.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.18 : 29,107.65 = 11,661.55 : x
  2. Step 2: Convert to fraction form
    21,091.18/29,107.65 = 11,661.55/x
  3. Step 3: Cross multiply
    21,091.18x = 29,107.65 × 11,661.55
  4. Step 4: Simplify right side
    21,091.18x = 339,440,315.86
  5. Step 5: Solve for x
    x = 339,440,315.86/21,091.18
  6. Step 6: Final answer
    x = 16,093.95

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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.