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Finding the Fourth Proportional to 12,503.28, 18,736.08 and 8,328.56

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Solution

The fourth proportional to 12,503.28, 18,736.08 and 8,328.56 is: 12,480.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,503.28 : 18,736.08 = 8,328.56 : x
  2. Step 2: Convert to fraction form
    12,503.28/18,736.08 = 8,328.56/x
  3. Step 3: Cross multiply
    12,503.28x = 18,736.08 × 8,328.56
  4. Step 4: Simplify right side
    12,503.28x = 156,044,566.44
  5. Step 5: Solve for x
    x = 156,044,566.44/12,503.28
  6. Step 6: Final answer
    x = 12,480.29

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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.