Home / 15,219.64-21,003.91-8,505.43

Finding the Fourth Proportional to 15,219.64, 21,003.91 and 8,505.43

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Solution

The fourth proportional to 15,219.64, 21,003.91 and 8,505.43 is: 11,737.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.64 : 21,003.91 = 8,505.43 : x
  2. Step 2: Convert to fraction form
    15,219.64/21,003.91 = 8,505.43/x
  3. Step 3: Cross multiply
    15,219.64x = 21,003.91 × 8,505.43
  4. Step 4: Simplify right side
    15,219.64x = 178,647,286.23
  5. Step 5: Solve for x
    x = 178,647,286.23/15,219.64
  6. Step 6: Final answer
    x = 11,737.94

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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.