Home / 12,819.40-19,229.10-12,261.80

Finding the Fourth Proportional to 12,819.40, 19,229.10 and 12,261.80

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Solution

The fourth proportional to 12,819.40, 19,229.10 and 12,261.80 is: 18,392.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.40 : 19,229.10 = 12,261.80 : x
  2. Step 2: Convert to fraction form
    12,819.40/19,229.10 = 12,261.80/x
  3. Step 3: Cross multiply
    12,819.40x = 19,229.10 × 12,261.80
  4. Step 4: Simplify right side
    12,819.40x = 235,783,378.38
  5. Step 5: Solve for x
    x = 235,783,378.38/12,819.40
  6. Step 6: Final answer
    x = 18,392.70

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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.