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Finding the Fourth Proportional to 12,443.60, 18,665.40 and 4,651.40

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Solution

The fourth proportional to 12,443.60, 18,665.40 and 4,651.40 is: 6,977.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,443.60 : 18,665.40 = 4,651.40 : x
  2. Step 2: Convert to fraction form
    12,443.60/18,665.40 = 4,651.40/x
  3. Step 3: Cross multiply
    12,443.60x = 18,665.40 × 4,651.40
  4. Step 4: Simplify right side
    12,443.60x = 86,820,241.56
  5. Step 5: Solve for x
    x = 86,820,241.56/12,443.60
  6. Step 6: Final answer
    x = 6,977.10

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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.