Home / 21,960.11-30,303.87-12,401.09

Finding the Fourth Proportional to 21,960.11, 30,303.87 and 12,401.09

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Solution

The fourth proportional to 21,960.11, 30,303.87 and 12,401.09 is: 17,112.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.11 : 30,303.87 = 12,401.09 : x
  2. Step 2: Convert to fraction form
    21,960.11/30,303.87 = 12,401.09/x
  3. Step 3: Cross multiply
    21,960.11x = 30,303.87 × 12,401.09
  4. Step 4: Simplify right side
    21,960.11x = 375,800,867.70
  5. Step 5: Solve for x
    x = 375,800,867.70/21,960.11
  6. Step 6: Final answer
    x = 17,112.89

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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.