Home / 20,676.50-28,521.77-12,713.09

Finding the Fourth Proportional to 20,676.50, 28,521.77 and 12,713.09

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Solution

The fourth proportional to 20,676.50, 28,521.77 and 12,713.09 is: 17,536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.50 : 28,521.77 = 12,713.09 : x
  2. Step 2: Convert to fraction form
    20,676.50/28,521.77 = 12,713.09/x
  3. Step 3: Cross multiply
    20,676.50x = 28,521.77 × 12,713.09
  4. Step 4: Simplify right side
    20,676.50x = 362,599,694.31
  5. Step 5: Solve for x
    x = 362,599,694.31/20,676.50
  6. Step 6: Final answer
    x = 17,536.80

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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.