Home / 15,492.43-21,379.68-8,418.85

Finding the Fourth Proportional to 15,492.43, 21,379.68 and 8,418.85

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Solution

The fourth proportional to 15,492.43, 21,379.68 and 8,418.85 is: 11,618.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.43 : 21,379.68 = 8,418.85 : x
  2. Step 2: Convert to fraction form
    15,492.43/21,379.68 = 8,418.85/x
  3. Step 3: Cross multiply
    15,492.43x = 21,379.68 × 8,418.85
  4. Step 4: Simplify right side
    15,492.43x = 179,992,318.97
  5. Step 5: Solve for x
    x = 179,992,318.97/15,492.43
  6. Step 6: Final answer
    x = 11,618.08

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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.