Home / 20,239.35-27,912.09-12,686.46

Finding the Fourth Proportional to 20,239.35, 27,912.09 and 12,686.46

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Solution

The fourth proportional to 20,239.35, 27,912.09 and 12,686.46 is: 17,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.35 : 27,912.09 = 12,686.46 : x
  2. Step 2: Convert to fraction form
    20,239.35/27,912.09 = 12,686.46/x
  3. Step 3: Cross multiply
    20,239.35x = 27,912.09 × 12,686.46
  4. Step 4: Simplify right side
    20,239.35x = 354,105,613.30
  5. Step 5: Solve for x
    x = 354,105,613.30/20,239.35
  6. Step 6: Final answer
    x = 17,495.90

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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.