Home / 12,180.21-16,812.19-7,144.64

Finding the Fourth Proportional to 12,180.21, 16,812.19 and 7,144.64

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Solution

The fourth proportional to 12,180.21, 16,812.19 and 7,144.64 is: 9,861.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.21 : 16,812.19 = 7,144.64 : x
  2. Step 2: Convert to fraction form
    12,180.21/16,812.19 = 7,144.64/x
  3. Step 3: Cross multiply
    12,180.21x = 16,812.19 × 7,144.64
  4. Step 4: Simplify right side
    12,180.21x = 120,117,045.16
  5. Step 5: Solve for x
    x = 120,117,045.16/12,180.21
  6. Step 6: Final answer
    x = 9,861.66

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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.