Home / 21,664.68-29,899.36-13,164.94

Finding the Fourth Proportional to 21,664.68, 29,899.36 and 13,164.94

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Solution

The fourth proportional to 21,664.68, 29,899.36 and 13,164.94 is: 18,168.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,664.68 : 29,899.36 = 13,164.94 : x
  2. Step 2: Convert to fraction form
    21,664.68/29,899.36 = 13,164.94/x
  3. Step 3: Cross multiply
    21,664.68x = 29,899.36 × 13,164.94
  4. Step 4: Simplify right side
    21,664.68x = 393,623,280.44
  5. Step 5: Solve for x
    x = 393,623,280.44/21,664.68
  6. Step 6: Final answer
    x = 18,168.89

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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.