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Finding the Fourth Proportional to 8,240.60, 11,343.46 and 7,190.84

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Solution

The fourth proportional to 8,240.60, 11,343.46 and 7,190.84 is: 9,898.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.60 : 11,343.46 = 7,190.84 : x
  2. Step 2: Convert to fraction form
    8,240.60/11,343.46 = 7,190.84/x
  3. Step 3: Cross multiply
    8,240.60x = 11,343.46 × 7,190.84
  4. Step 4: Simplify right side
    8,240.60x = 81,569,005.91
  5. Step 5: Solve for x
    x = 81,569,005.91/8,240.60
  6. Step 6: Final answer
    x = 9,898.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.