Home / 15,520.30-21,418.08-8,446.79

Finding the Fourth Proportional to 15,520.30, 21,418.08 and 8,446.79

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Solution

The fourth proportional to 15,520.30, 21,418.08 and 8,446.79 is: 11,656.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.30 : 21,418.08 = 8,446.79 : x
  2. Step 2: Convert to fraction form
    15,520.30/21,418.08 = 8,446.79/x
  3. Step 3: Cross multiply
    15,520.30x = 21,418.08 × 8,446.79
  4. Step 4: Simplify right side
    15,520.30x = 180,914,023.96
  5. Step 5: Solve for x
    x = 180,914,023.96/15,520.30
  6. Step 6: Final answer
    x = 11,656.61

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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.