Home / 28,638.94-39,519.72-15,892.78

Finding the Fourth Proportional to 28,638.94, 39,519.72 and 15,892.78

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Solution

The fourth proportional to 28,638.94, 39,519.72 and 15,892.78 is: 21,930.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638.94 : 39,519.72 = 15,892.78 : x
  2. Step 2: Convert to fraction form
    28,638.94/39,519.72 = 15,892.78/x
  3. Step 3: Cross multiply
    28,638.94x = 39,519.72 × 15,892.78
  4. Step 4: Simplify right side
    28,638.94x = 628,078,215.62
  5. Step 5: Solve for x
    x = 628,078,215.62/28,638.94
  6. Step 6: Final answer
    x = 21,930.92

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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.