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Finding the Fourth Proportional to 20,612.67, 30,921.43 and 6,567.81

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Solution

The fourth proportional to 20,612.67, 30,921.43 and 6,567.81 is: 9,852.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.67 : 30,921.43 = 6,567.81 : x
  2. Step 2: Convert to fraction form
    20,612.67/30,921.43 = 6,567.81/x
  3. Step 3: Cross multiply
    20,612.67x = 30,921.43 × 6,567.81
  4. Step 4: Simplify right side
    20,612.67x = 203,086,077.17
  5. Step 5: Solve for x
    x = 203,086,077.17/20,612.67
  6. Step 6: Final answer
    x = 9,852.49

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1.5x scale

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.