Home / 12,814.20-19,221.30-8,839.80

Finding the Fourth Proportional to 12,814.20, 19,221.30 and 8,839.80

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Solution

The fourth proportional to 12,814.20, 19,221.30 and 8,839.80 is: 13,259.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,814.20 : 19,221.30 = 8,839.80 : x
  2. Step 2: Convert to fraction form
    12,814.20/19,221.30 = 8,839.80/x
  3. Step 3: Cross multiply
    12,814.20x = 19,221.30 × 8,839.80
  4. Step 4: Simplify right side
    12,814.20x = 169,912,447.74
  5. Step 5: Solve for x
    x = 169,912,447.74/12,814.20
  6. Step 6: Final answer
    x = 13,259.70

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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.