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Finding the Fourth Proportional to 8,388.80, 12,583.20 and 7,966.40

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Solution

The fourth proportional to 8,388.80, 12,583.20 and 7,966.40 is: 11,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388.80 : 12,583.20 = 7,966.40 : x
  2. Step 2: Convert to fraction form
    8,388.80/12,583.20 = 7,966.40/x
  3. Step 3: Cross multiply
    8,388.80x = 12,583.20 × 7,966.40
  4. Step 4: Simplify right side
    8,388.80x = 100,242,804.48
  5. Step 5: Solve for x
    x = 100,242,804.48/8,388.80
  6. Step 6: Final answer
    x = 11,949.60

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Similar ratio
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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.