Home / 12,639.74-17,441.64-12,215.09

Finding the Fourth Proportional to 12,639.74, 17,441.64 and 12,215.09

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Solution

The fourth proportional to 12,639.74, 17,441.64 and 12,215.09 is: 16,855.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.74 : 17,441.64 = 12,215.09 : x
  2. Step 2: Convert to fraction form
    12,639.74/17,441.64 = 12,215.09/x
  3. Step 3: Cross multiply
    12,639.74x = 17,441.64 × 12,215.09
  4. Step 4: Simplify right side
    12,639.74x = 213,051,115.14
  5. Step 5: Solve for x
    x = 213,051,115.14/12,639.74
  6. Step 6: Final answer
    x = 16,855.66

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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.