Home / 21,119.30-29,144.37-11,559.09

Finding the Fourth Proportional to 21,119.30, 29,144.37 and 11,559.09

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Solution

The fourth proportional to 21,119.30, 29,144.37 and 11,559.09 is: 15,951.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.30 : 29,144.37 = 11,559.09 : x
  2. Step 2: Convert to fraction form
    21,119.30/29,144.37 = 11,559.09/x
  3. Step 3: Cross multiply
    21,119.30x = 29,144.37 × 11,559.09
  4. Step 4: Simplify right side
    21,119.30x = 336,882,395.82
  5. Step 5: Solve for x
    x = 336,882,395.82/21,119.30
  6. Step 6: Final answer
    x = 15,951.40

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Half scale
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Double scale
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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.