Home / 21,132.21-29,163.86-12,180.29

Finding the Fourth Proportional to 21,132.21, 29,163.86 and 12,180.29

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Solution

The fourth proportional to 21,132.21, 29,163.86 and 12,180.29 is: 16,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.21 : 29,163.86 = 12,180.29 : x
  2. Step 2: Convert to fraction form
    21,132.21/29,163.86 = 12,180.29/x
  3. Step 3: Cross multiply
    21,132.21x = 29,163.86 × 12,180.29
  4. Step 4: Simplify right side
    21,132.21x = 355,224,065.60
  5. Step 5: Solve for x
    x = 355,224,065.60/21,132.21
  6. Step 6: Final answer
    x = 16,809.60

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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.