Home / 21,081.24-29,091.60-11,520.69

Finding the Fourth Proportional to 21,081.24, 29,091.60 and 11,520.69

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Solution

The fourth proportional to 21,081.24, 29,091.60 and 11,520.69 is: 15,898.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.24 : 29,091.60 = 11,520.69 : x
  2. Step 2: Convert to fraction form
    21,081.24/29,091.60 = 11,520.69/x
  3. Step 3: Cross multiply
    21,081.24x = 29,091.60 × 11,520.69
  4. Step 4: Simplify right side
    21,081.24x = 335,155,305.20
  5. Step 5: Solve for x
    x = 335,155,305.20/21,081.24
  6. Step 6: Final answer
    x = 15,898.27

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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.