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Finding the Fourth Proportional to 12,546.80, 18,809.40 and 7,611.20

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Solution

The fourth proportional to 12,546.80, 18,809.40 and 7,611.20 is: 11,410.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,546.80 : 18,809.40 = 7,611.20 : x
  2. Step 2: Convert to fraction form
    12,546.80/18,809.40 = 7,611.20/x
  3. Step 3: Cross multiply
    12,546.80x = 18,809.40 × 7,611.20
  4. Step 4: Simplify right side
    12,546.80x = 143,162,105.28
  5. Step 5: Solve for x
    x = 143,162,105.28/12,546.80
  6. Step 6: Final answer
    x = 11,410.25

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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.