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Finding the Fourth Proportional to 10,612.02, 15,917.99 and 2,820.90

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Solution

The fourth proportional to 10,612.02, 15,917.99 and 2,820.90 is: 4,231.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,612.02 : 15,917.99 = 2,820.90 : x
  2. Step 2: Convert to fraction form
    10,612.02/15,917.99 = 2,820.90/x
  3. Step 3: Cross multiply
    10,612.02x = 15,917.99 × 2,820.90
  4. Step 4: Simplify right side
    10,612.02x = 44,903,057.99
  5. Step 5: Solve for x
    x = 44,903,057.99/10,612.02
  6. Step 6: Final answer
    x = 4,231.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.