Home / 20,825.25-28,738.13-11,875.63

Finding the Fourth Proportional to 20,825.25, 28,738.13 and 11,875.63

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Solution

The fourth proportional to 20,825.25, 28,738.13 and 11,875.63 is: 16,387.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.25 : 28,738.13 = 11,875.63 : x
  2. Step 2: Convert to fraction form
    20,825.25/28,738.13 = 11,875.63/x
  3. Step 3: Cross multiply
    20,825.25x = 28,738.13 × 11,875.63
  4. Step 4: Simplify right side
    20,825.25x = 341,283,321.43
  5. Step 5: Solve for x
    x = 341,283,321.43/20,825.25
  6. Step 6: Final answer
    x = 16,387.96

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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.