Home / 21,240.30-29,311.71-13,287.18

Finding the Fourth Proportional to 21,240.30, 29,311.71 and 13,287.18

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Solution

The fourth proportional to 21,240.30, 29,311.71 and 13,287.18 is: 18,336.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.30 : 29,311.71 = 13,287.18 : x
  2. Step 2: Convert to fraction form
    21,240.30/29,311.71 = 13,287.18/x
  3. Step 3: Cross multiply
    21,240.30x = 29,311.71 × 13,287.18
  4. Step 4: Simplify right side
    21,240.30x = 389,469,966.88
  5. Step 5: Solve for x
    x = 389,469,966.88/21,240.30
  6. Step 6: Final answer
    x = 18,336.37

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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.