Home / 38,638.60-57,996.30-18,939.40

Finding the Fourth Proportional to 38,638.60, 57,996.30 and 18,939.40

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Solution

The fourth proportional to 38,638.60, 57,996.30 and 18,939.40 is: 28,427.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,638.60 : 57,996.30 = 18,939.40 : x
  2. Step 2: Convert to fraction form
    38,638.60/57,996.30 = 18,939.40/x
  3. Step 3: Cross multiply
    38,638.60x = 57,996.30 × 18,939.40
  4. Step 4: Simplify right side
    38,638.60x = 1,098,415,124.22
  5. Step 5: Solve for x
    x = 1,098,415,124.22/38,638.60
  6. Step 6: Final answer
    x = 28,427.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.