Home / 20,715.26-28,601.79-12,759.98

Finding the Fourth Proportional to 20,715.26, 28,601.79 and 12,759.98

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Solution

The fourth proportional to 20,715.26, 28,601.79 and 12,759.98 is: 17,617.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.26 : 28,601.79 = 12,759.98 : x
  2. Step 2: Convert to fraction form
    20,715.26/28,601.79 = 12,759.98/x
  3. Step 3: Cross multiply
    20,715.26x = 28,601.79 × 12,759.98
  4. Step 4: Simplify right side
    20,715.26x = 364,958,268.36
  5. Step 5: Solve for x
    x = 364,958,268.36/20,715.26
  6. Step 6: Final answer
    x = 17,617.85

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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.