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Finding the Fourth Proportional to 15,063.21, 20,786.70 and 8,349.47

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Solution

The fourth proportional to 15,063.21, 20,786.70 and 8,349.47 is: 11,521.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.21 : 20,786.70 = 8,349.47 : x
  2. Step 2: Convert to fraction form
    15,063.21/20,786.70 = 8,349.47/x
  3. Step 3: Cross multiply
    15,063.21x = 20,786.70 × 8,349.47
  4. Step 4: Simplify right side
    15,063.21x = 173,557,928.05
  5. Step 5: Solve for x
    x = 173,557,928.05/15,063.21
  6. Step 6: Final answer
    x = 11,521.97

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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.