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Finding the Fourth Proportional to 18,905.83, 28,361.82 and 6,426.97

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Solution

The fourth proportional to 18,905.83, 28,361.82 and 6,426.97 is: 9,641.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.83 : 28,361.82 = 6,426.97 : x
  2. Step 2: Convert to fraction form
    18,905.83/28,361.82 = 6,426.97/x
  3. Step 3: Cross multiply
    18,905.83x = 28,361.82 × 6,426.97
  4. Step 4: Simplify right side
    18,905.83x = 182,280,566.29
  5. Step 5: Solve for x
    x = 182,280,566.29/18,905.83
  6. Step 6: Final answer
    x = 9,641.50

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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.