Home / 15,170.34-20,934.38-8,456.70

Finding the Fourth Proportional to 15,170.34, 20,934.38 and 8,456.70

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Solution

The fourth proportional to 15,170.34, 20,934.38 and 8,456.70 is: 11,669.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,170.34 : 20,934.38 = 8,456.70 : x
  2. Step 2: Convert to fraction form
    15,170.34/20,934.38 = 8,456.70/x
  3. Step 3: Cross multiply
    15,170.34x = 20,934.38 × 8,456.70
  4. Step 4: Simplify right side
    15,170.34x = 177,035,771.35
  5. Step 5: Solve for x
    x = 177,035,771.35/15,170.34
  6. Step 6: Final answer
    x = 11,669.86

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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.