Home / 21,836.21-30,135.04-12,279.11

Finding the Fourth Proportional to 21,836.21, 30,135.04 and 12,279.11

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Solution

The fourth proportional to 21,836.21, 30,135.04 and 12,279.11 is: 16,945.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.21 : 30,135.04 = 12,279.11 : x
  2. Step 2: Convert to fraction form
    21,836.21/30,135.04 = 12,279.11/x
  3. Step 3: Cross multiply
    21,836.21x = 30,135.04 × 12,279.11
  4. Step 4: Simplify right side
    21,836.21x = 370,031,289.64
  5. Step 5: Solve for x
    x = 370,031,289.64/21,836.21
  6. Step 6: Final answer
    x = 16,945.77

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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.