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Finding the Fourth Proportional to 12,449.60, 18,674.40 and 11,218.40

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Solution

The fourth proportional to 12,449.60, 18,674.40 and 11,218.40 is: 16,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,449.60 : 18,674.40 = 11,218.40 : x
  2. Step 2: Convert to fraction form
    12,449.60/18,674.40 = 11,218.40/x
  3. Step 3: Cross multiply
    12,449.60x = 18,674.40 × 11,218.40
  4. Step 4: Simplify right side
    12,449.60x = 209,496,888.96
  5. Step 5: Solve for x
    x = 209,496,888.96/12,449.60
  6. Step 6: Final answer
    x = 16,827.60

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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.