Home / 21,199.81-29,255.87-11,640.11

Finding the Fourth Proportional to 21,199.81, 29,255.87 and 11,640.11

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Solution

The fourth proportional to 21,199.81, 29,255.87 and 11,640.11 is: 16,063.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.81 : 29,255.87 = 11,640.11 : x
  2. Step 2: Convert to fraction form
    21,199.81/29,255.87 = 11,640.11/x
  3. Step 3: Cross multiply
    21,199.81x = 29,255.87 × 11,640.11
  4. Step 4: Simplify right side
    21,199.81x = 340,541,544.95
  5. Step 5: Solve for x
    x = 340,541,544.95/21,199.81
  6. Step 6: Final answer
    x = 16,063.42

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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.