Home / 20,839.79-28,758.94-11,887.06

Finding the Fourth Proportional to 20,839.79, 28,758.94 and 11,887.06

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Solution

The fourth proportional to 20,839.79, 28,758.94 and 11,887.06 is: 16,404.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.79 : 28,758.94 = 11,887.06 : x
  2. Step 2: Convert to fraction form
    20,839.79/28,758.94 = 11,887.06/x
  3. Step 3: Cross multiply
    20,839.79x = 28,758.94 × 11,887.06
  4. Step 4: Simplify right side
    20,839.79x = 341,859,245.32
  5. Step 5: Solve for x
    x = 341,859,245.32/20,839.79
  6. Step 6: Final answer
    x = 16,404.16

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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.