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Finding the Fourth Proportional to 12,711.70, 19,069.35 and 3,945.70

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Solution

The fourth proportional to 12,711.70, 19,069.35 and 3,945.70 is: 5,919.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.70 : 19,069.35 = 3,945.70 : x
  2. Step 2: Convert to fraction form
    12,711.70/19,069.35 = 3,945.70/x
  3. Step 3: Cross multiply
    12,711.70x = 19,069.35 × 3,945.70
  4. Step 4: Simplify right side
    12,711.70x = 75,241,934.30
  5. Step 5: Solve for x
    x = 75,241,934.30/12,711.70
  6. Step 6: Final answer
    x = 5,919.11

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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.