Home / 20,754.28-31,242.16-18,611

Finding the Fourth Proportional to 20,754.28, 31,242.16 and 18,611

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Solution

The fourth proportional to 20,754.28, 31,242.16 and 18,611 is: 28,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.28 : 31,242.16 = 18,611 : x
  2. Step 2: Convert to fraction form
    20,754.28/31,242.16 = 18,611/x
  3. Step 3: Cross multiply
    20,754.28x = 31,242.16 × 18,611
  4. Step 4: Simplify right side
    20,754.28x = 581,447,839.76
  5. Step 5: Solve for x
    x = 581,447,839.76/20,754.28
  6. Step 6: Final answer
    x = 28,015.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.