Home / 20,638.19-28,480.41-11,685.46

Finding the Fourth Proportional to 20,638.19, 28,480.41 and 11,685.46

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Solution

The fourth proportional to 20,638.19, 28,480.41 and 11,685.46 is: 16,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.19 : 28,480.41 = 11,685.46 : x
  2. Step 2: Convert to fraction form
    20,638.19/28,480.41 = 11,685.46/x
  3. Step 3: Cross multiply
    20,638.19x = 28,480.41 × 11,685.46
  4. Step 4: Simplify right side
    20,638.19x = 332,806,691.84
  5. Step 5: Solve for x
    x = 332,806,691.84/20,638.19
  6. Step 6: Final answer
    x = 16,125.77

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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.