Home / 13,157.22-18,160.54-8,120.64

Finding the Fourth Proportional to 13,157.22, 18,160.54 and 8,120.64

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Solution

The fourth proportional to 13,157.22, 18,160.54 and 8,120.64 is: 11,208.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.22 : 18,160.54 = 8,120.64 : x
  2. Step 2: Convert to fraction form
    13,157.22/18,160.54 = 8,120.64/x
  3. Step 3: Cross multiply
    13,157.22x = 18,160.54 × 8,120.64
  4. Step 4: Simplify right side
    13,157.22x = 147,475,207.55
  5. Step 5: Solve for x
    x = 147,475,207.55/13,157.22
  6. Step 6: Final answer
    x = 11,208.69

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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.