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Finding the Fourth Proportional to 12,659.60, 18,989.30 and 3,299.60

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Solution

The fourth proportional to 12,659.60, 18,989.30 and 3,299.60 is: 4,949.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.60 : 18,989.30 = 3,299.60 : x
  2. Step 2: Convert to fraction form
    12,659.60/18,989.30 = 3,299.60/x
  3. Step 3: Cross multiply
    12,659.60x = 18,989.30 × 3,299.60
  4. Step 4: Simplify right side
    12,659.60x = 62,657,094.28
  5. Step 5: Solve for x
    x = 62,657,094.28/12,659.60
  6. Step 6: Final answer
    x = 4,949.37

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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.