Home / 28,757.28-39,651.09-19,687.01

Finding the Fourth Proportional to 28,757.28, 39,651.09 and 19,687.01

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Solution

The fourth proportional to 28,757.28, 39,651.09 and 19,687.01 is: 27,144.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757.28 : 39,651.09 = 19,687.01 : x
  2. Step 2: Convert to fraction form
    28,757.28/39,651.09 = 19,687.01/x
  3. Step 3: Cross multiply
    28,757.28x = 39,651.09 × 19,687.01
  4. Step 4: Simplify right side
    28,757.28x = 780,611,207.09
  5. Step 5: Solve for x
    x = 780,611,207.09/28,757.28
  6. Step 6: Final answer
    x = 27,144.82

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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.