Home / 21,133.20-31,704.60-12,363.60

Finding the Fourth Proportional to 21,133.20, 31,704.60 and 12,363.60

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Solution

The fourth proportional to 21,133.20, 31,704.60 and 12,363.60 is: 18,548.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.20 : 31,704.60 = 12,363.60 : x
  2. Step 2: Convert to fraction form
    21,133.20/31,704.60 = 12,363.60/x
  3. Step 3: Cross multiply
    21,133.20x = 31,704.60 × 12,363.60
  4. Step 4: Simplify right side
    21,133.20x = 391,982,992.56
  5. Step 5: Solve for x
    x = 391,982,992.56/21,133.20
  6. Step 6: Final answer
    x = 18,548.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.