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Finding the Fourth Proportional to 6,919.03, 10,378.49 and 1,988.65

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Solution

The fourth proportional to 6,919.03, 10,378.49 and 1,988.65 is: 2,982.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.03 : 10,378.49 = 1,988.65 : x
  2. Step 2: Convert to fraction form
    6,919.03/10,378.49 = 1,988.65/x
  3. Step 3: Cross multiply
    6,919.03x = 10,378.49 × 1,988.65
  4. Step 4: Simplify right side
    6,919.03x = 20,639,174.20
  5. Step 5: Solve for x
    x = 20,639,174.20/6,919.03
  6. Step 6: Final answer
    x = 2,982.96

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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.