Home / 12,929.21-19,355.54-7,982.94

Finding the Fourth Proportional to 12,929.21, 19,355.54 and 7,982.94

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Solution

The fourth proportional to 12,929.21, 19,355.54 and 7,982.94 is: 11,950.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,929.21 : 19,355.54 = 7,982.94 : x
  2. Step 2: Convert to fraction form
    12,929.21/19,355.54 = 7,982.94/x
  3. Step 3: Cross multiply
    12,929.21x = 19,355.54 × 7,982.94
  4. Step 4: Simplify right side
    12,929.21x = 154,514,074.57
  5. Step 5: Solve for x
    x = 154,514,074.57/12,929.21
  6. Step 6: Final answer
    x = 11,950.78

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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.