Home / 12,905.70-19,358.55-12,711.30

Finding the Fourth Proportional to 12,905.70, 19,358.55 and 12,711.30

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Solution

The fourth proportional to 12,905.70, 19,358.55 and 12,711.30 is: 19,066.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.70 : 19,358.55 = 12,711.30 : x
  2. Step 2: Convert to fraction form
    12,905.70/19,358.55 = 12,711.30/x
  3. Step 3: Cross multiply
    12,905.70x = 19,358.55 × 12,711.30
  4. Step 4: Simplify right side
    12,905.70x = 246,072,336.62
  5. Step 5: Solve for x
    x = 246,072,336.62/12,905.70
  6. Step 6: Final answer
    x = 19,066.95

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Similar ratio
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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.