Home / 21,217.44-29,279.78-11,785.80

Finding the Fourth Proportional to 21,217.44, 29,279.78 and 11,785.80

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Solution

The fourth proportional to 21,217.44, 29,279.78 and 11,785.80 is: 16,264.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.44 : 29,279.78 = 11,785.80 : x
  2. Step 2: Convert to fraction form
    21,217.44/29,279.78 = 11,785.80/x
  3. Step 3: Cross multiply
    21,217.44x = 29,279.78 × 11,785.80
  4. Step 4: Simplify right side
    21,217.44x = 345,085,631.12
  5. Step 5: Solve for x
    x = 345,085,631.12/21,217.44
  6. Step 6: Final answer
    x = 16,264.24

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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.