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Finding the Fourth Proportional to 12,282.90, 18,423.90 and 3,517.80

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Solution

The fourth proportional to 12,282.90, 18,423.90 and 3,517.80 is: 5,276.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,282.90 : 18,423.90 = 3,517.80 : x
  2. Step 2: Convert to fraction form
    12,282.90/18,423.90 = 3,517.80/x
  3. Step 3: Cross multiply
    12,282.90x = 18,423.90 × 3,517.80
  4. Step 4: Simplify right side
    12,282.90x = 64,811,595.42
  5. Step 5: Solve for x
    x = 64,811,595.42/12,282.90
  6. Step 6: Final answer
    x = 5,276.57

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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.