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Finding the Fourth Proportional to 15,893.67, 21,933.40 and 8,820.21

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Solution

The fourth proportional to 15,893.67, 21,933.40 and 8,820.21 is: 12,171.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,893.67 : 21,933.40 = 8,820.21 : x
  2. Step 2: Convert to fraction form
    15,893.67/21,933.40 = 8,820.21/x
  3. Step 3: Cross multiply
    15,893.67x = 21,933.40 × 8,820.21
  4. Step 4: Simplify right side
    15,893.67x = 193,457,270.75
  5. Step 5: Solve for x
    x = 193,457,270.75/15,893.67
  6. Step 6: Final answer
    x = 12,171.97

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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.