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Finding the Fourth Proportional to 18,703.48, 28,049.13 and 6,220.15

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Solution

The fourth proportional to 18,703.48, 28,049.13 and 6,220.15 is: 9,328.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.48 : 28,049.13 = 6,220.15 : x
  2. Step 2: Convert to fraction form
    18,703.48/28,049.13 = 6,220.15/x
  3. Step 3: Cross multiply
    18,703.48x = 28,049.13 × 6,220.15
  4. Step 4: Simplify right side
    18,703.48x = 174,469,795.97
  5. Step 5: Solve for x
    x = 174,469,795.97/18,703.48
  6. Step 6: Final answer
    x = 9,328.20

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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.