Home / 12,130.12-18,170.70-8,372.68

Finding the Fourth Proportional to 12,130.12, 18,170.70 and 8,372.68

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Solution

The fourth proportional to 12,130.12, 18,170.70 and 8,372.68 is: 12,542.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,130.12 : 18,170.70 = 8,372.68 : x
  2. Step 2: Convert to fraction form
    12,130.12/18,170.70 = 8,372.68/x
  3. Step 3: Cross multiply
    12,130.12x = 18,170.70 × 8,372.68
  4. Step 4: Simplify right side
    12,130.12x = 152,137,456.48
  5. Step 5: Solve for x
    x = 152,137,456.48/12,130.12
  6. Step 6: Final answer
    x = 12,542.12

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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.