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Finding the Fourth Proportional to 57,616, 86,424 and 13,840

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Solution

The fourth proportional to 57,616, 86,424 and 13,840 is: 20,760

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,616 : 86,424 = 13,840 : x
  2. Step 2: Convert to fraction form
    57,616/86,424 = 13,840/x
  3. Step 3: Cross multiply
    57,616x = 86,424 × 13,840
  4. Step 4: Simplify right side
    57,616x = 1,196,108,160
  5. Step 5: Solve for x
    x = 1,196,108,160/57,616
  6. Step 6: Final answer
    x = 20,760

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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.