Home / 20,638.12-28,480.89-11,685.43

Finding the Fourth Proportional to 20,638.12, 28,480.89 and 11,685.43

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Solution

The fourth proportional to 20,638.12, 28,480.89 and 11,685.43 is: 16,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.12 : 28,480.89 = 11,685.43 : x
  2. Step 2: Convert to fraction form
    20,638.12/28,480.89 = 11,685.43/x
  3. Step 3: Cross multiply
    20,638.12x = 28,480.89 × 11,685.43
  4. Step 4: Simplify right side
    20,638.12x = 332,811,446.43
  5. Step 5: Solve for x
    x = 332,811,446.43/20,638.12
  6. Step 6: Final answer
    x = 16,126.05

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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.