Home / 21,288.27-29,384.63-13,734.81

Finding the Fourth Proportional to 21,288.27, 29,384.63 and 13,734.81

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Solution

The fourth proportional to 21,288.27, 29,384.63 and 13,734.81 is: 18,958.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.27 : 29,384.63 = 13,734.81 : x
  2. Step 2: Convert to fraction form
    21,288.27/29,384.63 = 13,734.81/x
  3. Step 3: Cross multiply
    21,288.27x = 29,384.63 × 13,734.81
  4. Step 4: Simplify right side
    21,288.27x = 403,592,241.30
  5. Step 5: Solve for x
    x = 403,592,241.30/21,288.27
  6. Step 6: Final answer
    x = 18,958.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.