Home / 21,284.81-29,372.79-11,724.51

Finding the Fourth Proportional to 21,284.81, 29,372.79 and 11,724.51

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Solution

The fourth proportional to 21,284.81, 29,372.79 and 11,724.51 is: 16,179.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.81 : 29,372.79 = 11,724.51 : x
  2. Step 2: Convert to fraction form
    21,284.81/29,372.79 = 11,724.51/x
  3. Step 3: Cross multiply
    21,284.81x = 29,372.79 × 11,724.51
  4. Step 4: Simplify right side
    21,284.81x = 344,381,724.20
  5. Step 5: Solve for x
    x = 344,381,724.20/21,284.81
  6. Step 6: Final answer
    x = 16,179.70

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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.