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Finding the Fourth Proportional to 12,577.60, 18,866.40 and 6,731.20

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Solution

The fourth proportional to 12,577.60, 18,866.40 and 6,731.20 is: 10,096.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,577.60 : 18,866.40 = 6,731.20 : x
  2. Step 2: Convert to fraction form
    12,577.60/18,866.40 = 6,731.20/x
  3. Step 3: Cross multiply
    12,577.60x = 18,866.40 × 6,731.20
  4. Step 4: Simplify right side
    12,577.60x = 126,993,511.68
  5. Step 5: Solve for x
    x = 126,993,511.68/12,577.60
  6. Step 6: Final answer
    x = 10,096.80

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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.