Home / 20,120.41-30,170.89-8,430.49

Finding the Fourth Proportional to 20,120.41, 30,170.89 and 8,430.49

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Solution

The fourth proportional to 20,120.41, 30,170.89 and 8,430.49 is: 12,641.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.41 : 30,170.89 = 8,430.49 : x
  2. Step 2: Convert to fraction form
    20,120.41/30,170.89 = 8,430.49/x
  3. Step 3: Cross multiply
    20,120.41x = 30,170.89 × 8,430.49
  4. Step 4: Simplify right side
    20,120.41x = 254,355,386.44
  5. Step 5: Solve for x
    x = 254,355,386.44/20,120.41
  6. Step 6: Final answer
    x = 12,641.66

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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.