Home / 21,604.20-29,813.31-12,171.75

Finding the Fourth Proportional to 21,604.20, 29,813.31 and 12,171.75

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Solution

The fourth proportional to 21,604.20, 29,813.31 and 12,171.75 is: 16,796.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,604.20 : 29,813.31 = 12,171.75 : x
  2. Step 2: Convert to fraction form
    21,604.20/29,813.31 = 12,171.75/x
  3. Step 3: Cross multiply
    21,604.20x = 29,813.31 × 12,171.75
  4. Step 4: Simplify right side
    21,604.20x = 362,880,155.99
  5. Step 5: Solve for x
    x = 362,880,155.99/21,604.20
  6. Step 6: Final answer
    x = 16,796.74

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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.