Home / 21,286.55-29,376.35-11,855.11

Finding the Fourth Proportional to 21,286.55, 29,376.35 and 11,855.11

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Solution

The fourth proportional to 21,286.55, 29,376.35 and 11,855.11 is: 16,360.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.55 : 29,376.35 = 11,855.11 : x
  2. Step 2: Convert to fraction form
    21,286.55/29,376.35 = 11,855.11/x
  3. Step 3: Cross multiply
    21,286.55x = 29,376.35 × 11,855.11
  4. Step 4: Simplify right side
    21,286.55x = 348,259,794.13
  5. Step 5: Solve for x
    x = 348,259,794.13/21,286.55
  6. Step 6: Final answer
    x = 16,360.56

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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.