Home / 21,140.26-29,187.21-13,185.70

Finding the Fourth Proportional to 21,140.26, 29,187.21 and 13,185.70

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Solution

The fourth proportional to 21,140.26, 29,187.21 and 13,185.70 is: 18,204.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.26 : 29,187.21 = 13,185.70 : x
  2. Step 2: Convert to fraction form
    21,140.26/29,187.21 = 13,185.70/x
  3. Step 3: Cross multiply
    21,140.26x = 29,187.21 × 13,185.70
  4. Step 4: Simplify right side
    21,140.26x = 384,853,794.90
  5. Step 5: Solve for x
    x = 384,853,794.90/21,140.26
  6. Step 6: Final answer
    x = 18,204.78

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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.