Home / 21,195.36-29,240.46-12,807

Finding the Fourth Proportional to 21,195.36, 29,240.46 and 12,807

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Solution

The fourth proportional to 21,195.36, 29,240.46 and 12,807 is: 17,668.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.36 : 29,240.46 = 12,807 : x
  2. Step 2: Convert to fraction form
    21,195.36/29,240.46 = 12,807/x
  3. Step 3: Cross multiply
    21,195.36x = 29,240.46 × 12,807
  4. Step 4: Simplify right side
    21,195.36x = 374,482,571.22
  5. Step 5: Solve for x
    x = 374,482,571.22/21,195.36
  6. Step 6: Final answer
    x = 17,668.14

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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.