Home / 21,131.20-29,161.20-11,699.56

Finding the Fourth Proportional to 21,131.20, 29,161.20 and 11,699.56

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Solution

The fourth proportional to 21,131.20, 29,161.20 and 11,699.56 is: 16,145.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.20 : 29,161.20 = 11,699.56 : x
  2. Step 2: Convert to fraction form
    21,131.20/29,161.20 = 11,699.56/x
  3. Step 3: Cross multiply
    21,131.20x = 29,161.20 × 11,699.56
  4. Step 4: Simplify right side
    21,131.20x = 341,173,209.07
  5. Step 5: Solve for x
    x = 341,173,209.07/21,131.20
  6. Step 6: Final answer
    x = 16,145.47

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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.