Home / 13,120.45-18,104.64-7,453.15

Finding the Fourth Proportional to 13,120.45, 18,104.64 and 7,453.15

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Solution

The fourth proportional to 13,120.45, 18,104.64 and 7,453.15 is: 10,284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.45 : 18,104.64 = 7,453.15 : x
  2. Step 2: Convert to fraction form
    13,120.45/18,104.64 = 7,453.15/x
  3. Step 3: Cross multiply
    13,120.45x = 18,104.64 × 7,453.15
  4. Step 4: Simplify right side
    13,120.45x = 134,936,597.62
  5. Step 5: Solve for x
    x = 134,936,597.62/13,120.45
  6. Step 6: Final answer
    x = 10,284.45

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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.