Home / 13,422.71-18,524.80-8,120.45

Finding the Fourth Proportional to 13,422.71, 18,524.80 and 8,120.45

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Solution

The fourth proportional to 13,422.71, 18,524.80 and 8,120.45 is: 11,207.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.71 : 18,524.80 = 8,120.45 : x
  2. Step 2: Convert to fraction form
    13,422.71/18,524.80 = 8,120.45/x
  3. Step 3: Cross multiply
    13,422.71x = 18,524.80 × 8,120.45
  4. Step 4: Simplify right side
    13,422.71x = 150,429,768.62
  5. Step 5: Solve for x
    x = 150,429,768.62/13,422.71
  6. Step 6: Final answer
    x = 11,207.11

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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.