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Finding the Fourth Proportional to 7,890.81, 11,838.12 and 2,960.49

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Solution

The fourth proportional to 7,890.81, 11,838.12 and 2,960.49 is: 4,441.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.81 : 11,838.12 = 2,960.49 : x
  2. Step 2: Convert to fraction form
    7,890.81/11,838.12 = 2,960.49/x
  3. Step 3: Cross multiply
    7,890.81x = 11,838.12 × 2,960.49
  4. Step 4: Simplify right side
    7,890.81x = 35,046,635.88
  5. Step 5: Solve for x
    x = 35,046,635.88/7,890.81
  6. Step 6: Final answer
    x = 4,441.45

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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.