Home / 12,215.90-16,857.18-11,857.61

Finding the Fourth Proportional to 12,215.90, 16,857.18 and 11,857.61

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Solution

The fourth proportional to 12,215.90, 16,857.18 and 11,857.61 is: 16,362.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.90 : 16,857.18 = 11,857.61 : x
  2. Step 2: Convert to fraction form
    12,215.90/16,857.18 = 11,857.61/x
  3. Step 3: Cross multiply
    12,215.90x = 16,857.18 × 11,857.61
  4. Step 4: Simplify right side
    12,215.90x = 199,885,781.85
  5. Step 5: Solve for x
    x = 199,885,781.85/12,215.90
  6. Step 6: Final answer
    x = 16,362.76

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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.