Home / 21,464.83-29,619.97-11,905.21

Finding the Fourth Proportional to 21,464.83, 29,619.97 and 11,905.21

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Solution

The fourth proportional to 21,464.83, 29,619.97 and 11,905.21 is: 16,428.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,464.83 : 29,619.97 = 11,905.21 : x
  2. Step 2: Convert to fraction form
    21,464.83/29,619.97 = 11,905.21/x
  3. Step 3: Cross multiply
    21,464.83x = 29,619.97 × 11,905.21
  4. Step 4: Simplify right side
    21,464.83x = 352,631,963.04
  5. Step 5: Solve for x
    x = 352,631,963.04/21,464.83
  6. Step 6: Final answer
    x = 16,428.36

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1.5x scale

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.