Home / 21,921.39-30,251.58-13,961.91

Finding the Fourth Proportional to 21,921.39, 30,251.58 and 13,961.91

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Solution

The fourth proportional to 21,921.39, 30,251.58 and 13,961.91 is: 19,267.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.39 : 30,251.58 = 13,961.91 : x
  2. Step 2: Convert to fraction form
    21,921.39/30,251.58 = 13,961.91/x
  3. Step 3: Cross multiply
    21,921.39x = 30,251.58 × 13,961.91
  4. Step 4: Simplify right side
    21,921.39x = 422,369,837.32
  5. Step 5: Solve for x
    x = 422,369,837.32/21,921.39
  6. Step 6: Final answer
    x = 19,267.48

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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.