Home / 13,390.66-18,479.26-7,422.44

Finding the Fourth Proportional to 13,390.66, 18,479.26 and 7,422.44

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Solution

The fourth proportional to 13,390.66, 18,479.26 and 7,422.44 is: 10,243.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.66 : 18,479.26 = 7,422.44 : x
  2. Step 2: Convert to fraction form
    13,390.66/18,479.26 = 7,422.44/x
  3. Step 3: Cross multiply
    13,390.66x = 18,479.26 × 7,422.44
  4. Step 4: Simplify right side
    13,390.66x = 137,161,198.59
  5. Step 5: Solve for x
    x = 137,161,198.59/13,390.66
  6. Step 6: Final answer
    x = 10,243.05

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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.