Home / 21,808.19-30,087.42-12,371.28

Finding the Fourth Proportional to 21,808.19, 30,087.42 and 12,371.28

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Solution

The fourth proportional to 21,808.19, 30,087.42 and 12,371.28 is: 17,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.19 : 30,087.42 = 12,371.28 : x
  2. Step 2: Convert to fraction form
    21,808.19/30,087.42 = 12,371.28/x
  3. Step 3: Cross multiply
    21,808.19x = 30,087.42 × 12,371.28
  4. Step 4: Simplify right side
    21,808.19x = 372,220,011.70
  5. Step 5: Solve for x
    x = 372,220,011.70/21,808.19
  6. Step 6: Final answer
    x = 17,067.90

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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.