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Finding the Fourth Proportional to 57,872.20, 86,813.10 and 18,428.20

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Solution

The fourth proportional to 57,872.20, 86,813.10 and 18,428.20 is: 27,643.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,872.20 : 86,813.10 = 18,428.20 : x
  2. Step 2: Convert to fraction form
    57,872.20/86,813.10 = 18,428.20/x
  3. Step 3: Cross multiply
    57,872.20x = 86,813.10 × 18,428.20
  4. Step 4: Simplify right side
    57,872.20x = 1,599,809,169.42
  5. Step 5: Solve for x
    x = 1,599,809,169.42/57,872.20
  6. Step 6: Final answer
    x = 27,643.83

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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.