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Finding the Fourth Proportional to 12,411.60, 18,568.80 and 11,245.20

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Solution

The fourth proportional to 12,411.60, 18,568.80 and 11,245.20 is: 16,823.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,411.60 : 18,568.80 = 11,245.20 : x
  2. Step 2: Convert to fraction form
    12,411.60/18,568.80 = 11,245.20/x
  3. Step 3: Cross multiply
    12,411.60x = 18,568.80 × 11,245.20
  4. Step 4: Simplify right side
    12,411.60x = 208,809,869.76
  5. Step 5: Solve for x
    x = 208,809,869.76/12,411.60
  6. Step 6: Final answer
    x = 16,823.77

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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.