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Finding the Fourth Proportional to 57,871.40, 86,813.25 and 18,419.29

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Solution

The fourth proportional to 57,871.40, 86,813.25 and 18,419.29 is: 27,630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,871.40 : 86,813.25 = 18,419.29 : x
  2. Step 2: Convert to fraction form
    57,871.40/86,813.25 = 18,419.29/x
  3. Step 3: Cross multiply
    57,871.40x = 86,813.25 × 18,419.29
  4. Step 4: Simplify right side
    57,871.40x = 1,599,038,427.59
  5. Step 5: Solve for x
    x = 1,599,038,427.59/57,871.40
  6. Step 6: Final answer
    x = 27,630.89

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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.