Home / 21,682.18-29,921.85-11,991.94

Finding the Fourth Proportional to 21,682.18, 29,921.85 and 11,991.94

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Solution

The fourth proportional to 21,682.18, 29,921.85 and 11,991.94 is: 16,549.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,682.18 : 29,921.85 = 11,991.94 : x
  2. Step 2: Convert to fraction form
    21,682.18/29,921.85 = 11,991.94/x
  3. Step 3: Cross multiply
    21,682.18x = 29,921.85 × 11,991.94
  4. Step 4: Simplify right side
    21,682.18x = 358,821,029.89
  5. Step 5: Solve for x
    x = 358,821,029.89/21,682.18
  6. Step 6: Final answer
    x = 16,549.12

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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.