Home / 27,638.12-38,139.72-15,704.12

Finding the Fourth Proportional to 27,638.12, 38,139.72 and 15,704.12

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Solution

The fourth proportional to 27,638.12, 38,139.72 and 15,704.12 is: 21,671.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,638.12 : 38,139.72 = 15,704.12 : x
  2. Step 2: Convert to fraction form
    27,638.12/38,139.72 = 15,704.12/x
  3. Step 3: Cross multiply
    27,638.12x = 38,139.72 × 15,704.12
  4. Step 4: Simplify right side
    27,638.12x = 598,950,739.65
  5. Step 5: Solve for x
    x = 598,950,739.65/27,638.12
  6. Step 6: Final answer
    x = 21,671.18

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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.