Home / 20,890.98-28,813.26-12,937.62

Finding the Fourth Proportional to 20,890.98, 28,813.26 and 12,937.62

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Solution

The fourth proportional to 20,890.98, 28,813.26 and 12,937.62 is: 17,843.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.98 : 28,813.26 = 12,937.62 : x
  2. Step 2: Convert to fraction form
    20,890.98/28,813.26 = 12,937.62/x
  3. Step 3: Cross multiply
    20,890.98x = 28,813.26 × 12,937.62
  4. Step 4: Simplify right side
    20,890.98x = 372,775,008.84
  5. Step 5: Solve for x
    x = 372,775,008.84/20,890.98
  6. Step 6: Final answer
    x = 17,843.83

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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.