Home / 15,520.38-21,418.32-8,446.80

Finding the Fourth Proportional to 15,520.38, 21,418.32 and 8,446.80

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Solution

The fourth proportional to 15,520.38, 21,418.32 and 8,446.80 is: 11,656.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.38 : 21,418.32 = 8,446.80 : x
  2. Step 2: Convert to fraction form
    15,520.38/21,418.32 = 8,446.80/x
  3. Step 3: Cross multiply
    15,520.38x = 21,418.32 × 8,446.80
  4. Step 4: Simplify right side
    15,520.38x = 180,916,265.38
  5. Step 5: Solve for x
    x = 180,916,265.38/15,520.38
  6. Step 6: Final answer
    x = 11,656.69

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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.