Home / 13,155.21-18,157.50-8,447.69

Finding the Fourth Proportional to 13,155.21, 18,157.50 and 8,447.69

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Solution

The fourth proportional to 13,155.21, 18,157.50 and 8,447.69 is: 11,659.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.21 : 18,157.50 = 8,447.69 : x
  2. Step 2: Convert to fraction form
    13,155.21/18,157.50 = 8,447.69/x
  3. Step 3: Cross multiply
    13,155.21x = 18,157.50 × 8,447.69
  4. Step 4: Simplify right side
    13,155.21x = 153,388,976.57
  5. Step 5: Solve for x
    x = 153,388,976.57/13,155.21
  6. Step 6: Final answer
    x = 11,659.94

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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.