Home / 21,722.08-29,979.68-13,765.04

Finding the Fourth Proportional to 21,722.08, 29,979.68 and 13,765.04

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Solution

The fourth proportional to 21,722.08, 29,979.68 and 13,765.04 is: 18,997.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.08 : 29,979.68 = 13,765.04 : x
  2. Step 2: Convert to fraction form
    21,722.08/29,979.68 = 13,765.04/x
  3. Step 3: Cross multiply
    21,722.08x = 29,979.68 × 13,765.04
  4. Step 4: Simplify right side
    21,722.08x = 412,671,494.39
  5. Step 5: Solve for x
    x = 412,671,494.39/21,722.08
  6. Step 6: Final answer
    x = 18,997.79

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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.