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Finding the Fourth Proportional to 19,170.51, 28,765.19 and 8,647.80

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Solution

The fourth proportional to 19,170.51, 28,765.19 and 8,647.80 is: 12,975.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,170.51 : 28,765.19 = 8,647.80 : x
  2. Step 2: Convert to fraction form
    19,170.51/28,765.19 = 8,647.80/x
  3. Step 3: Cross multiply
    19,170.51x = 28,765.19 × 8,647.80
  4. Step 4: Simplify right side
    19,170.51x = 248,755,523.83
  5. Step 5: Solve for x
    x = 248,755,523.83/19,170.51
  6. Step 6: Final answer
    x = 12,975.95

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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.