Home / 15,707.35-21,676.58-8,634.43

Finding the Fourth Proportional to 15,707.35, 21,676.58 and 8,634.43

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Solution

The fourth proportional to 15,707.35, 21,676.58 and 8,634.43 is: 11,915.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,707.35 : 21,676.58 = 8,634.43 : x
  2. Step 2: Convert to fraction form
    15,707.35/21,676.58 = 8,634.43/x
  3. Step 3: Cross multiply
    15,707.35x = 21,676.58 × 8,634.43
  4. Step 4: Simplify right side
    15,707.35x = 187,164,912.65
  5. Step 5: Solve for x
    x = 187,164,912.65/15,707.35
  6. Step 6: Final answer
    x = 11,915.75

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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.