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Finding the Fourth Proportional to 7,776.57, 11,661.21 and 3,390.42

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Solution

The fourth proportional to 7,776.57, 11,661.21 and 3,390.42 is: 5,084.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,776.57 : 11,661.21 = 3,390.42 : x
  2. Step 2: Convert to fraction form
    7,776.57/11,661.21 = 3,390.42/x
  3. Step 3: Cross multiply
    7,776.57x = 11,661.21 × 3,390.42
  4. Step 4: Simplify right side
    7,776.57x = 39,536,399.61
  5. Step 5: Solve for x
    x = 39,536,399.61/7,776.57
  6. Step 6: Final answer
    x = 5,084.04

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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.