Home / 21,221.35-29,286.02-12,724.86

Finding the Fourth Proportional to 21,221.35, 29,286.02 and 12,724.86

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Solution

The fourth proportional to 21,221.35, 29,286.02 and 12,724.86 is: 17,560.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.35 : 29,286.02 = 12,724.86 : x
  2. Step 2: Convert to fraction form
    21,221.35/29,286.02 = 12,724.86/x
  3. Step 3: Cross multiply
    21,221.35x = 29,286.02 × 12,724.86
  4. Step 4: Simplify right side
    21,221.35x = 372,660,504.46
  5. Step 5: Solve for x
    x = 372,660,504.46/21,221.35
  6. Step 6: Final answer
    x = 17,560.64

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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.