Home / 21,183.85-29,221.57-13,212.23

Finding the Fourth Proportional to 21,183.85, 29,221.57 and 13,212.23

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Solution

The fourth proportional to 21,183.85, 29,221.57 and 13,212.23 is: 18,225.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.85 : 29,221.57 = 13,212.23 : x
  2. Step 2: Convert to fraction form
    21,183.85/29,221.57 = 13,212.23/x
  3. Step 3: Cross multiply
    21,183.85x = 29,221.57 × 13,212.23
  4. Step 4: Simplify right side
    21,183.85x = 386,082,143.82
  5. Step 5: Solve for x
    x = 386,082,143.82/21,183.85
  6. Step 6: Final answer
    x = 18,225.31

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Half scale
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Double scale
Find fourth proportional to 21,184.85, 29,222.95 and 13,213.23
Similar ratio
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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.