Home / 12,255.40-18,383.10-8,318.80

Finding the Fourth Proportional to 12,255.40, 18,383.10 and 8,318.80

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Solution

The fourth proportional to 12,255.40, 18,383.10 and 8,318.80 is: 12,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.40 : 18,383.10 = 8,318.80 : x
  2. Step 2: Convert to fraction form
    12,255.40/18,383.10 = 8,318.80/x
  3. Step 3: Cross multiply
    12,255.40x = 18,383.10 × 8,318.80
  4. Step 4: Simplify right side
    12,255.40x = 152,925,332.28
  5. Step 5: Solve for x
    x = 152,925,332.28/12,255.40
  6. Step 6: Final answer
    x = 12,478.20

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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.