Home / 20,992.72-28,983.88-13,046.80

Finding the Fourth Proportional to 20,992.72, 28,983.88 and 13,046.80

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Solution

The fourth proportional to 20,992.72, 28,983.88 and 13,046.80 is: 18,013.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.72 : 28,983.88 = 13,046.80 : x
  2. Step 2: Convert to fraction form
    20,992.72/28,983.88 = 13,046.80/x
  3. Step 3: Cross multiply
    20,992.72x = 28,983.88 × 13,046.80
  4. Step 4: Simplify right side
    20,992.72x = 378,146,885.58
  5. Step 5: Solve for x
    x = 378,146,885.58/20,992.72
  6. Step 6: Final answer
    x = 18,013.24

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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.