Home / 12,659.12-18,990.72-3,894.02

Finding the Fourth Proportional to 12,659.12, 18,990.72 and 3,894.02

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Solution

The fourth proportional to 12,659.12, 18,990.72 and 3,894.02 is: 5,841.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.12 : 18,990.72 = 3,894.02 : x
  2. Step 2: Convert to fraction form
    12,659.12/18,990.72 = 3,894.02/x
  3. Step 3: Cross multiply
    12,659.12x = 18,990.72 × 3,894.02
  4. Step 4: Simplify right side
    12,659.12x = 73,950,326.58
  5. Step 5: Solve for x
    x = 73,950,326.58/12,659.12
  6. Step 6: Final answer
    x = 5,841.66

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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.