Home / 12,479.33-18,741.31-11,977.65

Finding the Fourth Proportional to 12,479.33, 18,741.31 and 11,977.65

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Solution

The fourth proportional to 12,479.33, 18,741.31 and 11,977.65 is: 17,987.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.33 : 18,741.31 = 11,977.65 : x
  2. Step 2: Convert to fraction form
    12,479.33/18,741.31 = 11,977.65/x
  3. Step 3: Cross multiply
    12,479.33x = 18,741.31 × 11,977.65
  4. Step 4: Simplify right side
    12,479.33x = 224,476,821.78
  5. Step 5: Solve for x
    x = 224,476,821.78/12,479.33
  6. Step 6: Final answer
    x = 17,987.89

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1.5x scale

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.