Home / 21,851.75-30,171.11-15,125.73

Finding the Fourth Proportional to 21,851.75, 30,171.11 and 15,125.73

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Solution

The fourth proportional to 21,851.75, 30,171.11 and 15,125.73 is: 20,884.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.75 : 30,171.11 = 15,125.73 : x
  2. Step 2: Convert to fraction form
    21,851.75/30,171.11 = 15,125.73/x
  3. Step 3: Cross multiply
    21,851.75x = 30,171.11 × 15,125.73
  4. Step 4: Simplify right side
    21,851.75x = 456,359,988.03
  5. Step 5: Solve for x
    x = 456,359,988.03/21,851.75
  6. Step 6: Final answer
    x = 20,884.37

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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.