Home / 8,121.12-12,167.36-5,777.64

Finding the Fourth Proportional to 8,121.12, 12,167.36 and 5,777.64

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Solution

The fourth proportional to 8,121.12, 12,167.36 and 5,777.64 is: 8,656.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.12 : 12,167.36 = 5,777.64 : x
  2. Step 2: Convert to fraction form
    8,121.12/12,167.36 = 5,777.64/x
  3. Step 3: Cross multiply
    8,121.12x = 12,167.36 × 5,777.64
  4. Step 4: Simplify right side
    8,121.12x = 70,298,625.83
  5. Step 5: Solve for x
    x = 70,298,625.83/8,121.12
  6. Step 6: Final answer
    x = 8,656.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.