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Finding the Fourth Proportional to 18,679.92, 28,019.88 and 17,745.60

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Solution

The fourth proportional to 18,679.92, 28,019.88 and 17,745.60 is: 26,618.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.92 : 28,019.88 = 17,745.60 : x
  2. Step 2: Convert to fraction form
    18,679.92/28,019.88 = 17,745.60/x
  3. Step 3: Cross multiply
    18,679.92x = 28,019.88 × 17,745.60
  4. Step 4: Simplify right side
    18,679.92x = 497,229,582.53
  5. Step 5: Solve for x
    x = 497,229,582.53/18,679.92
  6. Step 6: Final answer
    x = 26,618.40

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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.