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Finding the Fourth Proportional to 7,847.80, 11,771.70 and 6,551.80

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Solution

The fourth proportional to 7,847.80, 11,771.70 and 6,551.80 is: 9,827.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,847.80 : 11,771.70 = 6,551.80 : x
  2. Step 2: Convert to fraction form
    7,847.80/11,771.70 = 6,551.80/x
  3. Step 3: Cross multiply
    7,847.80x = 11,771.70 × 6,551.80
  4. Step 4: Simplify right side
    7,847.80x = 77,125,824.06
  5. Step 5: Solve for x
    x = 77,125,824.06/7,847.80
  6. Step 6: Final answer
    x = 9,827.70

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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.