Home / 12,215.16-18,213.84-11,257.74

Finding the Fourth Proportional to 12,215.16, 18,213.84 and 11,257.74

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Solution

The fourth proportional to 12,215.16, 18,213.84 and 11,257.74 is: 16,786.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.16 : 18,213.84 = 11,257.74 : x
  2. Step 2: Convert to fraction form
    12,215.16/18,213.84 = 11,257.74/x
  3. Step 3: Cross multiply
    12,215.16x = 18,213.84 × 11,257.74
  4. Step 4: Simplify right side
    12,215.16x = 205,046,675.12
  5. Step 5: Solve for x
    x = 205,046,675.12/12,215.16
  6. Step 6: Final answer
    x = 16,786.25

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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.