Home / 20,638.67-28,480.80-11,687.01

Finding the Fourth Proportional to 20,638.67, 28,480.80 and 11,687.01

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Solution

The fourth proportional to 20,638.67, 28,480.80 and 11,687.01 is: 16,127.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.67 : 28,480.80 = 11,687.01 : x
  2. Step 2: Convert to fraction form
    20,638.67/28,480.80 = 11,687.01/x
  3. Step 3: Cross multiply
    20,638.67x = 28,480.80 × 11,687.01
  4. Step 4: Simplify right side
    20,638.67x = 332,855,394.41
  5. Step 5: Solve for x
    x = 332,855,394.41/20,638.67
  6. Step 6: Final answer
    x = 16,127.76

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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.