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Finding the Fourth Proportional to 7,966.60, 11,949.90 and 7,664.20

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Solution

The fourth proportional to 7,966.60, 11,949.90 and 7,664.20 is: 11,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,966.60 : 11,949.90 = 7,664.20 : x
  2. Step 2: Convert to fraction form
    7,966.60/11,949.90 = 7,664.20/x
  3. Step 3: Cross multiply
    7,966.60x = 11,949.90 × 7,664.20
  4. Step 4: Simplify right side
    7,966.60x = 91,586,423.58
  5. Step 5: Solve for x
    x = 91,586,423.58/7,966.60
  6. Step 6: Final answer
    x = 11,496.30

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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.