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Finding the Fourth Proportional to 57,871.92, 86,808.09 and 20,411.64

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Solution

The fourth proportional to 57,871.92, 86,808.09 and 20,411.64 is: 30,617.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,871.92 : 86,808.09 = 20,411.64 : x
  2. Step 2: Convert to fraction form
    57,871.92/86,808.09 = 20,411.64/x
  3. Step 3: Cross multiply
    57,871.92x = 86,808.09 × 20,411.64
  4. Step 4: Simplify right side
    57,871.92x = 1,771,895,482.17
  5. Step 5: Solve for x
    x = 1,771,895,482.17/57,871.92
  6. Step 6: Final answer
    x = 30,617.53

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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.