Home / 20,678.88-28,537.76-12,723.75

Finding the Fourth Proportional to 20,678.88, 28,537.76 and 12,723.75

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Solution

The fourth proportional to 20,678.88, 28,537.76 and 12,723.75 is: 17,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.88 : 28,537.76 = 12,723.75 : x
  2. Step 2: Convert to fraction form
    20,678.88/28,537.76 = 12,723.75/x
  3. Step 3: Cross multiply
    20,678.88x = 28,537.76 × 12,723.75
  4. Step 4: Simplify right side
    20,678.88x = 363,107,260.18
  5. Step 5: Solve for x
    x = 363,107,260.18/20,678.88
  6. Step 6: Final answer
    x = 17,559.33

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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.