Home / 12,144.40-18,216.60-8,207.80

Finding the Fourth Proportional to 12,144.40, 18,216.60 and 8,207.80

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Solution

The fourth proportional to 12,144.40, 18,216.60 and 8,207.80 is: 12,311.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,144.40 : 18,216.60 = 8,207.80 : x
  2. Step 2: Convert to fraction form
    12,144.40/18,216.60 = 8,207.80/x
  3. Step 3: Cross multiply
    12,144.40x = 18,216.60 × 8,207.80
  4. Step 4: Simplify right side
    12,144.40x = 149,518,209.48
  5. Step 5: Solve for x
    x = 149,518,209.48/12,144.40
  6. Step 6: Final answer
    x = 12,311.70

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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.