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Finding the Fourth Proportional to 12,339.60, 18,485.10 and 11,464.80

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Solution

The fourth proportional to 12,339.60, 18,485.10 and 11,464.80 is: 17,174.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.60 : 18,485.10 = 11,464.80 : x
  2. Step 2: Convert to fraction form
    12,339.60/18,485.10 = 11,464.80/x
  3. Step 3: Cross multiply
    12,339.60x = 18,485.10 × 11,464.80
  4. Step 4: Simplify right side
    12,339.60x = 211,927,974.48
  5. Step 5: Solve for x
    x = 211,927,974.48/12,339.60
  6. Step 6: Final answer
    x = 17,174.62

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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.