Home / 12,156.66-18,238.77-10,321.20

Finding the Fourth Proportional to 12,156.66, 18,238.77 and 10,321.20

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Solution

The fourth proportional to 12,156.66, 18,238.77 and 10,321.20 is: 15,485.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.66 : 18,238.77 = 10,321.20 : x
  2. Step 2: Convert to fraction form
    12,156.66/18,238.77 = 10,321.20/x
  3. Step 3: Cross multiply
    12,156.66x = 18,238.77 × 10,321.20
  4. Step 4: Simplify right side
    12,156.66x = 188,245,992.92
  5. Step 5: Solve for x
    x = 188,245,992.92/12,156.66
  6. Step 6: Final answer
    x = 15,485.01

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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.