Home / 13,380.74-18,459.63-8,072.61

Finding the Fourth Proportional to 13,380.74, 18,459.63 and 8,072.61

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Solution

The fourth proportional to 13,380.74, 18,459.63 and 8,072.61 is: 11,136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.74 : 18,459.63 = 8,072.61 : x
  2. Step 2: Convert to fraction form
    13,380.74/18,459.63 = 8,072.61/x
  3. Step 3: Cross multiply
    13,380.74x = 18,459.63 × 8,072.61
  4. Step 4: Simplify right side
    13,380.74x = 149,017,393.73
  5. Step 5: Solve for x
    x = 149,017,393.73/13,380.74
  6. Step 6: Final answer
    x = 11,136.71

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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.