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Finding the Fourth Proportional to 12,808.60, 19,241.70 and 8,920.60

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Solution

The fourth proportional to 12,808.60, 19,241.70 and 8,920.60 is: 13,400.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.60 : 19,241.70 = 8,920.60 : x
  2. Step 2: Convert to fraction form
    12,808.60/19,241.70 = 8,920.60/x
  3. Step 3: Cross multiply
    12,808.60x = 19,241.70 × 8,920.60
  4. Step 4: Simplify right side
    12,808.60x = 171,647,509.02
  5. Step 5: Solve for x
    x = 171,647,509.02/12,808.60
  6. Step 6: Final answer
    x = 13,400.96

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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.