Home / 13,635.68-18,816.91-8,919.86

Finding the Fourth Proportional to 13,635.68, 18,816.91 and 8,919.86

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Solution

The fourth proportional to 13,635.68, 18,816.91 and 8,919.86 is: 12,309.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.68 : 18,816.91 = 8,919.86 : x
  2. Step 2: Convert to fraction form
    13,635.68/18,816.91 = 8,919.86/x
  3. Step 3: Cross multiply
    13,635.68x = 18,816.91 × 8,919.86
  4. Step 4: Simplify right side
    13,635.68x = 167,844,086.45
  5. Step 5: Solve for x
    x = 167,844,086.45/13,635.68
  6. Step 6: Final answer
    x = 12,309.19

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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.