Home / 21,317.91-29,418.32-11,758.70

Finding the Fourth Proportional to 21,317.91, 29,418.32 and 11,758.70

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Solution

The fourth proportional to 21,317.91, 29,418.32 and 11,758.70 is: 16,226.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.91 : 29,418.32 = 11,758.70 : x
  2. Step 2: Convert to fraction form
    21,317.91/29,418.32 = 11,758.70/x
  3. Step 3: Cross multiply
    21,317.91x = 29,418.32 × 11,758.70
  4. Step 4: Simplify right side
    21,317.91x = 345,920,993.50
  5. Step 5: Solve for x
    x = 345,920,993.50/21,317.91
  6. Step 6: Final answer
    x = 16,226.78

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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.