Home / 21,118.35-29,131.62-13,556.19

Finding the Fourth Proportional to 21,118.35, 29,131.62 and 13,556.19

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Solution

The fourth proportional to 21,118.35, 29,131.62 and 13,556.19 is: 18,700.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.35 : 29,131.62 = 13,556.19 : x
  2. Step 2: Convert to fraction form
    21,118.35/29,131.62 = 13,556.19/x
  3. Step 3: Cross multiply
    21,118.35x = 29,131.62 × 13,556.19
  4. Step 4: Simplify right side
    21,118.35x = 394,913,695.69
  5. Step 5: Solve for x
    x = 394,913,695.69/21,118.35
  6. Step 6: Final answer
    x = 18,700.03

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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.