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Finding the Fourth Proportional to 28,234.67, 38,961.29 and 15,487.30

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Solution

The fourth proportional to 28,234.67, 38,961.29 and 15,487.30 is: 21,371.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,234.67 : 38,961.29 = 15,487.30 : x
  2. Step 2: Convert to fraction form
    28,234.67/38,961.29 = 15,487.30/x
  3. Step 3: Cross multiply
    28,234.67x = 38,961.29 × 15,487.30
  4. Step 4: Simplify right side
    28,234.67x = 603,404,914.37
  5. Step 5: Solve for x
    x = 603,404,914.37/28,234.67
  6. Step 6: Final answer
    x = 21,371.06

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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.