Home / 28,625.78-39,485.40-20,679.68

Finding the Fourth Proportional to 28,625.78, 39,485.40 and 20,679.68

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Solution

The fourth proportional to 28,625.78, 39,485.40 and 20,679.68 is: 28,524.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.78 : 39,485.40 = 20,679.68 : x
  2. Step 2: Convert to fraction form
    28,625.78/39,485.40 = 20,679.68/x
  3. Step 3: Cross multiply
    28,625.78x = 39,485.40 × 20,679.68
  4. Step 4: Simplify right side
    28,625.78x = 816,545,436.67
  5. Step 5: Solve for x
    x = 816,545,436.67/28,625.78
  6. Step 6: Final answer
    x = 28,524.83

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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.