Home / 21,630.28-29,850.24-12,684.64

Finding the Fourth Proportional to 21,630.28, 29,850.24 and 12,684.64

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Solution

The fourth proportional to 21,630.28, 29,850.24 and 12,684.64 is: 17,505.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.28 : 29,850.24 = 12,684.64 : x
  2. Step 2: Convert to fraction form
    21,630.28/29,850.24 = 12,684.64/x
  3. Step 3: Cross multiply
    21,630.28x = 29,850.24 × 12,684.64
  4. Step 4: Simplify right side
    21,630.28x = 378,639,548.31
  5. Step 5: Solve for x
    x = 378,639,548.31/21,630.28
  6. Step 6: Final answer
    x = 17,505.07

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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.