Home / 21,982.21-30,331.45-12,291.84

Finding the Fourth Proportional to 21,982.21, 30,331.45 and 12,291.84

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Solution

The fourth proportional to 21,982.21, 30,331.45 and 12,291.84 is: 16,960.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.21 : 30,331.45 = 12,291.84 : x
  2. Step 2: Convert to fraction form
    21,982.21/30,331.45 = 12,291.84/x
  3. Step 3: Cross multiply
    21,982.21x = 30,331.45 × 12,291.84
  4. Step 4: Simplify right side
    21,982.21x = 372,829,288.86
  5. Step 5: Solve for x
    x = 372,829,288.86/21,982.21
  6. Step 6: Final answer
    x = 16,960.50

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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.