Home / 13,391.34-18,479.22-7,867.68

Finding the Fourth Proportional to 13,391.34, 18,479.22 and 7,867.68

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Solution

The fourth proportional to 13,391.34, 18,479.22 and 7,867.68 is: 10,856.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.34 : 18,479.22 = 7,867.68 : x
  2. Step 2: Convert to fraction form
    13,391.34/18,479.22 = 7,867.68/x
  3. Step 3: Cross multiply
    13,391.34x = 18,479.22 × 7,867.68
  4. Step 4: Simplify right side
    13,391.34x = 145,388,589.61
  5. Step 5: Solve for x
    x = 145,388,589.61/13,391.34
  6. Step 6: Final answer
    x = 10,856.91

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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.