Home / 12,645.21-18,960.42-5,240.80

Finding the Fourth Proportional to 12,645.21, 18,960.42 and 5,240.80

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Solution

The fourth proportional to 12,645.21, 18,960.42 and 5,240.80 is: 7,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.21 : 18,960.42 = 5,240.80 : x
  2. Step 2: Convert to fraction form
    12,645.21/18,960.42 = 5,240.80/x
  3. Step 3: Cross multiply
    12,645.21x = 18,960.42 × 5,240.80
  4. Step 4: Simplify right side
    12,645.21x = 99,367,674.33
  5. Step 5: Solve for x
    x = 99,367,674.33/12,645.21
  6. Step 6: Final answer
    x = 7,858.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.