Home / 27,638.83-38,142.60-15,704.20

Finding the Fourth Proportional to 27,638.83, 38,142.60 and 15,704.20

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Solution

The fourth proportional to 27,638.83, 38,142.60 and 15,704.20 is: 21,672.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,638.83 : 38,142.60 = 15,704.20 : x
  2. Step 2: Convert to fraction form
    27,638.83/38,142.60 = 15,704.20/x
  3. Step 3: Cross multiply
    27,638.83x = 38,142.60 × 15,704.20
  4. Step 4: Simplify right side
    27,638.83x = 598,998,828.21
  5. Step 5: Solve for x
    x = 598,998,828.21/27,638.83
  6. Step 6: Final answer
    x = 21,672.37

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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.