Home / 21,267.79-31,903.86-8,131.21

Finding the Fourth Proportional to 21,267.79, 31,903.86 and 8,131.21

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Solution

The fourth proportional to 21,267.79, 31,903.86 and 8,131.21 is: 12,197.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.79 : 31,903.86 = 8,131.21 : x
  2. Step 2: Convert to fraction form
    21,267.79/31,903.86 = 8,131.21/x
  3. Step 3: Cross multiply
    21,267.79x = 31,903.86 × 8,131.21
  4. Step 4: Simplify right side
    21,267.79x = 259,416,825.95
  5. Step 5: Solve for x
    x = 259,416,825.95/21,267.79
  6. Step 6: Final answer
    x = 12,197.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.