Home / 21,664.30-29,887.83-13,165.03

Finding the Fourth Proportional to 21,664.30, 29,887.83 and 13,165.03

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Solution

The fourth proportional to 21,664.30, 29,887.83 and 13,165.03 is: 18,162.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,664.30 : 29,887.83 = 13,165.03 : x
  2. Step 2: Convert to fraction form
    21,664.30/29,887.83 = 13,165.03/x
  3. Step 3: Cross multiply
    21,664.30x = 29,887.83 × 13,165.03
  4. Step 4: Simplify right side
    21,664.30x = 393,474,178.58
  5. Step 5: Solve for x
    x = 393,474,178.58/21,664.30
  6. Step 6: Final answer
    x = 18,162.33

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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.