Home / 12,480.12-18,861.81-12,265.08

Finding the Fourth Proportional to 12,480.12, 18,861.81 and 12,265.08

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Solution

The fourth proportional to 12,480.12, 18,861.81 and 12,265.08 is: 18,536.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.12 : 18,861.81 = 12,265.08 : x
  2. Step 2: Convert to fraction form
    12,480.12/18,861.81 = 12,265.08/x
  3. Step 3: Cross multiply
    12,480.12x = 18,861.81 × 12,265.08
  4. Step 4: Simplify right side
    12,480.12x = 231,341,608.59
  5. Step 5: Solve for x
    x = 231,341,608.59/12,480.12
  6. Step 6: Final answer
    x = 18,536.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.