Home / 12,739.32-18,992.68-12,415.61

Finding the Fourth Proportional to 12,739.32, 18,992.68 and 12,415.61

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Solution

The fourth proportional to 12,739.32, 18,992.68 and 12,415.61 is: 18,510.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.32 : 18,992.68 = 12,415.61 : x
  2. Step 2: Convert to fraction form
    12,739.32/18,992.68 = 12,415.61/x
  3. Step 3: Cross multiply
    12,739.32x = 18,992.68 × 12,415.61
  4. Step 4: Simplify right side
    12,739.32x = 235,805,707.73
  5. Step 5: Solve for x
    x = 235,805,707.73/12,739.32
  6. Step 6: Final answer
    x = 18,510.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.