Home / 15,321.85-21,131.21-12,943.49

Finding the Fourth Proportional to 15,321.85, 21,131.21 and 12,943.49

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Solution

The fourth proportional to 15,321.85, 21,131.21 and 12,943.49 is: 17,851.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.85 : 21,131.21 = 12,943.49 : x
  2. Step 2: Convert to fraction form
    15,321.85/21,131.21 = 12,943.49/x
  3. Step 3: Cross multiply
    15,321.85x = 21,131.21 × 12,943.49
  4. Step 4: Simplify right side
    15,321.85x = 273,511,532.03
  5. Step 5: Solve for x
    x = 273,511,532.03/15,321.85
  6. Step 6: Final answer
    x = 17,851.08

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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.